Equal Variances Research Articles

Examination of Gender Performance in Physics in Mankranso Senior High School

Despite ongoing efforts to promote inclusivity in science education, the persistent gender gap in physics remains a pressing concern. This study investigated potential gender differences in physics performance among senior high school students at Mankranso Senior High School in Ghana. A descriptive survey design was employed, utilizing student physics test scores from a stratified random sample (N = 111; 79 males, 32 females) from a population of 184 students. Descriptive statistics and inferential statistical tests were used to analyse the data. Descriptive statistics revealed a slightly higher mean score for females (M = 43.65, SD = 21.78) compared to males (M = 39.39, SD = 21.15). However, a two-sample t- test (t = - 0.721, df = 56, p = 0.474) showed no statistically significant difference in mean physics test scores between male and female students. Levene’s test for equality of variances (F = 0.210, p = 0.649) confirmed that the variability of scores was not significantly different between genders. The following conclusion was made, while females have a slightly higher average score (42.31) compared to males (41.29), the difference is not statistically significant. The study emphasizes the importance of creating equitable learning environments, focusing on individual student needs, and promoting inclusive practices that encourage all students to thrive in STEM fields. The following recommendations was made; be aware of potential unconscious biases that might impact how you interact with or perceive students of different genders. Offer students opportunities for enrichment, advanced coursework, or participation in science competitions. Further investigation and consideration of other potential factors influencing performance is recommended to gain a more comprehensive understanding.

Model-averaged Bayesian ttests.

One of the most common statistical analyses in experimental psychology concerns the comparison of two means using the frequentist ttest. However, frequentist ttests do not quantify evidence and require various assumption tests. Recently, popularized Bayesian ttests do quantify evidence, but these were developed for scenarios where the two populations are assumed to have the same variance. As an alternative to both methods, we outline a comprehensive ttest framework based on Bayesian model averaging. This new ttest framework simultaneously takes into account models that assume equal and unequal variances, and models that use t-likelihoods to improve robustness to outliers. The resulting inference is based on a weighted average across the entire model ensemble, with higher weights assigned to models that predicted the observed data well. This new ttest framework provides an integrated approach to assumption checks and inference by applying a series of pertinent models to the data simultaneously rather than sequentially. The integrated Bayesian model-averaged ttests achieve robustness without having to commit to a single model following a series of assumption checks. To facilitate practical applications, we provide user-friendly implementations in JASP and via the package in . A tutorial video is available at https://www.youtube.com/watch?v=EcuzGTIcorQ.

The Impact of the Project-Based Learning (PjBL) Model Assisted by Liveworksheet Media on Critical Thinking Skills of Vocational High School Students

This study investigates the effectiveness of the Project-Based Learning (PjBL) model integrated with Liveworksheet media in enhancing the critical thinking skills of vocational high school students. Employing a true experimental design with a pretest- posttest control group approach, the research compared two groups: the experimental group using PjBL with Liveworksheet and the control group receiving conventional instruction. Data collected from pretest and posttest assessments revealed that the experimental group demonstrated a significant improvement in critical thinking skills, with an average posttest score of 81, compared to 64 in the control group. The pretest scores showed no significant differences between the groups, indicating a similar starting point. Post-intervention results were analyzed using statistical tests, confirming the normal distribution and equal variances of data. The hypothesis testing further validated a substantial difference in critical thinking skills, favoring the PjBL model with Liveworksheet media. These results underscore the effectiveness of this innovative teaching approach in fostering critical thinking skills among vocational students

COMPARATIVE STUDY ON ANTHROPOMETRIC AND MOTOR DIFFERENCES IN U15 BASKETBALL PLAYERS

Basketball is a predominantly aerobic sport during which high-intensity anaerobic actions are performed. In recent years, this characteristic has evolved in terms of demands on the athlete and intensity of the competition, implying an increase in the number and duration of explosive actions. To meet the demands of this sport, good technical, tactical, physical and mental training is required. The research purpose was to determine the anthropometric and motor differences between two male basketball teams from a private club, both playing in the U15 age category. The study included 32 athletes who were divided into two groups. One group was made up of 16 players representing the club’s elite team, and the other group also consisted of 16 players representing the club’s secondary team for this age category. All players were tested in the same sports hall on two different days, during their training for the U15 National Basketball Championship of Romania. Anthropometric and physical characteristics were measured using a test battery with six variables: Height, Weight, Body mass index, 10 m Sprint, Standing long jump, Vertical jump, and Little Marathon. The methods used were: literature review, observation, mathematical statistics, tabular and graphical methods. Differences in anthropometric and physical values between the basketball players of the two teams were determined using the t-Test for independent small samples (Assuming Equal Variances). Our research hypothesis is confirmed, since there are significant anthropometric and motor differences between the players of the two representative club teams, justifying the presence of the elite team in the U15 National Basketball Championship.

Automatic measurement of stimulation to maximum negative dv/dt in V5 and V6 leads to confirm left bundle capture for conduction system pacing

Abstract Introduction Left bundle area conduction system pacing is obtained when the ventricular pacing lead is implanted into the right ventricular septum and captures the left bundle branch, demonstrated by right bundle branch morphology in the lead V1 and short stimulation to R-wave peak time (SRWPT) in leads V5 or V6. Manual measurements are challenging and result in significant variability. Maximum negative dv/dt in leads V5 and V6, occurring immediate after maximal lateral wall depolarization, represents the ideal measurement of synchronicity of left ventricular depolarization, as suggested by the guidelines. Objective To test feasibility of automatic algorithm to measure the maximum negative dV/dt in comparison to manual SRWPT measurement in V5 and V6. Method Data was collected from 7 patients with confirmed left bundle branch capture. Three trained operators manually measured SRWPT in leads V5 and V6 (Figure A). An algorithm capable of automatically measuring stimulation to maximum dv/dt was retrospectively applied to the same measured beats. Variability and correlation of measurements was compared between manual and automatic using the Bartlett Test for equal variance. Results In total, 137 individual beats were measured in the 2 leads by three operators resulting in 822 manual measurements. The mean variability of SRWPT in V5 and V6 was 2.9 ± 0.7 msec and 3.1 ± 1.1 msec, respectively (inter-operator correlation of 0.83). In contrast the stimulation to max negative dv/ dt mean variability in V5 and V6 was 1.3 ± 0.4 msec and 1.2 ± 0.5 msec, respectively (P < 0.001). The comparison of variation in measurement between manual and automatic measures are shown in a box and whisker plot in figure 2. Conclusion Manual measurement of SRWPT can be challenging resulting in higher variability compared to an automatic algorithm measuring max negative dv/dt. This study demonstrates the feasibility of automatic interval measurement in conduction system pacing; however, further studies are required to validate the reliability of such tool.Fig 1.Example ECG interval measurement

The Influence of Tic Tac Toe Game towards Students’ Speaking Ability

This study aims to determine the impact of using the Tic Tac Toe game on students' speaking abilities in the second grade at SMK N 7 Bandar Lampung during the academic year 2023/2024. The researcher wants to know how well the second graders at SMK N 7 Bandar Lampung master their language skills, mainly speaking skills. This study used a quasi-experimental design. The population consisted of second-grade students from SMK N 7 Bandar Lampung. The total sample size was 64 students drawn from two classes, XI Accounting 1 (experimental class) and XI Accounting 2 (control class), using cluster random sampling. The experimental class played tic-tac-toe, while the control class played role-playing games. The data were gathered using pre-and post-tests. The instrument consisted of oral test instruction for the pre-test and post-test, with topics covering asking and giving opinions. To analyze the data, the independent t-test formula from the SPSS 26 version was used in statistical computations. The t-test results reveal a significant impact of the Tic Tac Toe game on students' speaking ability. The generated Sig. (2-tailed) of equal variances assumed is 0.000, which is less than Ha = 0.05, indicating Ha's acceptance. This suggests that the use of the Tic Tac Toe game can significantly enhance the speaking abilities of second-grade students at SMK N 7 Bandar Lampung. These findings have practical implications for language educators, providing a promising tool to improve students' speaking skills

Multi-objective optimization towards cooling performance of teardrop section Kagome trusses array jet impingement composite cooling structure with cross-flow

Teardrop Section Kagome trusses array can be a spoiler for a new generation of advanced combustion chambers. In this study, multi-objective optimizations are applied to optimize a jet impingement composite cooling structure with cross-flow. Four structural parameters with five levels and three performance parameters are calculated in design of experiment and fitted by response surface methodology. The database is expanded by non-dominated sorting genetic algorithm-II, and then technique for order preference by similarity to an ideal solution is used to calculate the optimal structures under different operating conditions by different weights of the performance parameter. The conclusions are as follows: The minimal Equality of variances and fitting accuracy are 35.4371 and 93.6%. Diameter of the cross-section has the largest positive main effect on average Nusselt number and pressure loss coefficient, while angle between the rod and the horizontal plane has the largest positive effect on temperature uniformity coefficient. The interaction of trailing edge angle with angle between the front rod and the back rod in the horizontal plane is large. Case15 is chosen, where the weight ratio is 1:5:5, improvement of the corresponding optimized performance parameters of the simulation results with respect to the Origin of three performance parameters are 26.72%, −2.93%, 91.59% respectively. It provides a feasible reference for future advanced combustion chambers and accelerates their development process.

Gray relational analysis for parametric optimization of micro-EDM of thermo-mechanically processed AA7075 and AA7075/SiC/Gr composite

The AA7075 alloy and AA7075/SiC/Gr hybrid composite prepared by the stir-casting method have been further thermo-mechanically processed through unidirectional hot rolling and hot cross-rolling routes to eliminate casting defects like voids, blow holes etc. Three initial sample temperatures, that is, 350℃, 400℃, and 450℃, have been considered for the hot cross-rolling. The Al alloy and its hybrid composite prepared at different rolling temperatures are studied to investigate their micro-machining behavior through micro-electric discharge machining (µ-EDM). The micro-holes are made on the rolled samples along the rolling direction of the final rolling pass using a tool with twist drill bit geometry. Further, multi-objective optimization of the µ-EDM process parameters considering the response parameters viz. material removal rate (MRR) and tool wear rate (TWR) has been carried out using the gray relational analysis (GRA) technique. The µ-EDM parameters chosen to optimize in this study are voltage, pulse on time, and tool rotation. The obtained GRA results are further analyzed through normality and equal variance tests. The R-squared values of 95.02% and 95.53% for AA7075 alloy and hybrid composite, respectively, indicate that the data fit well with the statistical model. In material removal, the different electrical and thermal characteristics of the Al matrix and the reinforcements possibly generate sparks with a different characteristic that ultimately affects the MRR of the composite. Through scanning electron microscopy (SEM), the morphological study confirmed the presence of globules and voids on the machined surface. The formation of globules and voids is more significant in the AA7075 alloy than in the composite.

Interpretation of the Standardized Mean Difference Effect Size When Distributions Are Not Normal or Homoscedastic.

The standardized mean difference (sometimes called Cohen's d) is an effect size measure widely used to describe the outcomes of experiments. It is mathematically natural to describe differences between groups of data that are normally distributed with different means but the same standard deviation. In that context, it can be interpreted as determining several indexes of overlap between the two distributions. If the data are not approximately normally distributed or if they have substantially unequal standard deviations, the relation between d and overlap between distributions can be very different, and interpretations of d that apply when the data are normal with equal variances are unreliable.

7143 Near Term Cardiometabolic Outcomes in Transgender Boys and Men in the First Year of Gender-Affirming Testosterone Therapy

Abstract Disclosure: J. Dey: None. M. Widlansky: None. S. Cabrera: None. Background: Gender affirming testosterone (T) therapy is used to masculinize transgender adolescent men (TMs), resulting in elevated T and suppressed estradiol (E2). In cis-females, hypoestrogenism reduces vaso-protective E2-mediated estrogen receptor expression, decreasing nitric oxide vasodilation and increasing susceptibility to future vascular complications. Whether T promotes similar changes in TMs remains poorly understood. Methods: A longitudinal observational study is conducted in TMs aged 12-30yrs over the 1st yr of T, with visits at baseline (BL; pre-T), 6mo, and 1yr, compared to cis-males (CMs) with endogenous T. Primary outcome is change in brachial artery flow-mediated dilation (FMD%), an in vivo measure of vascular endothelial health, after 1yr of T. To detect a significant relative change in FMD%, 60 participants are needed (40 TMs, 20 CMs). Metabolic profile is assessed by fasting lipids, glucose, and insulin. Body composition is assessed by BMI and DEXA. Differences in mean values between and within a cohort were analyzed using the unpaired two-tailed T-test assuming unequal and equal variances, respectively. Results: To date, 51 participants are enrolled; the 21 participants who fully completed the study are included here (13 TMs, 8 CMs). At BL, TMs were post-menarchal with a mean age of 15.6yrs, ht 162.6cm, and BMI z-score 0.47. At BL, 46% were on progestin-only menstrual suppression. CMs had a mean age of 18.4yrs, ht 170.7cm, and BMI z-score 0.13. Cohorts were similar for age, height, and BMI.At BL, FMD% was higher in TMs than CMs (8.2 vs 4.6, p=0.01) but not at 1yr (6.9 vs 6.2, p=0.6). FMD% did not change in TMs receiving T over 1yr (8.2 vs 6.9, p=0.3). At BL, the brachial artery resting diameter (mm) was lower in TMs than CMs (2.6 vs 3.5, p<0.01) and remained such at 1-yr. Resting diameter increased in TMs over 1yr of T (2.6 vs 3.1, p<0.01) but not in CMs. There were no differences in resting or hyperemic flow velocity, or FMD (mm) between or within groups. At BL, % lean body mass (%LBM) was lower in TMs than CMs (60 vs 72, p<0.01) and estimated percent visceral adiposity tissue (%VAT) was higher (26 vs 14, p<0.01). In TMs, %LBM increased (60 vs 66, p <0.01) and %VAT decreased (26 vs 21, p<0.01) over 1yr of T, such that TMs and CMs were similar at 1yr. At BL, TMs had lower T but similar E2 (46 vs 27 pg/mL, p=0.2) to CMs. At 1-yr, TMs and CMs had similar T (556 vs 574 ng/dL, p=0.9) and E2 (52 vs 29, p=0.1). In TMs, T did not change E2. Lipid and glycemic indices did not change over 1yr in TMs. Conclusion: Initial analyses suggest that T does not affect FMD; however, FMD% interpretation is confounded by the small number of participants, progestins at BL in TMs, and the lower resting brachial artery diameter in TMs. The stable E2 in TMs on T may explain the stable FMD%. Overall, our findings suggest T results in relative stability of vascular and metabolic function and a beneficial shift in body composition in TMs. Presentation: 6/2/2024

The Effect of Tapioca Flour and Bogor Taro Flour (Colocasia esculenta L. Schott) Formulations on the Chemical, Physical, and Sensory Characteristics of Catfish Sausage (Pangasius hypophtalmus)

This study was aimed to determine the effect of tapioca flour and Bogor taro flour formulation on the chemical, physical, and sensory characteristics of catfish sausage and to determine the best formulation. This study was arranged in a Randomized Complete Group Design (RCGD) with a single factor of tapioca flour and Bogor taro flour formulation with 6 treatments P1 (100%:0%), P2 (80%:20%), P3 (60%:40%), P4 (40%:60%), P5 (20%:80%), and P6 (0%:100%) with 4 replications. Data were tested for equality of variance with Barlett's test and data saturation with Tuckey's test. The data were analyzed for variance to determine the effect between treatments, then further analyzed using the HSD test at the 5% level. The results showed that the formulation of tapioca flour and Bogor taro flour had a very significant on water content, ash content, hardness, springiness, cohesiveness, appearance, and overall acceptance but no effect on the taste and aroma of catfish sausage. P5 was the best treatment with a water content of 52.08%, ash content of 1.55%, hardness of 270.75 gf, springiness of 10.03 mm, cohesiveness of 0.83, appearance of 2.93 (slightly dull), taste of 3.87 (typical of fish), aroma of 3.87 (typical of fish), overall acceptance of 3.88 (like), protein content of 15.61%, and fat content of 4.29%.

The Effect of Using Worksheet Based on a Scientific Approach Assisted by Scaffolding on High School Student’s Cognitive Learning Outcomes on Temperature and Heat Material

Abstract This paper aims to find out the influence of worksheets based on a scientific approach assisted by scaffolding on temperature and heat material on students’ learning outcomes. This research aims to give a guided student a scientific approach to understanding temperature and heat using worksheet-assisted scaffolding as a teacher’s guidance. It uses a five-step guided scientific approach. This research employs a quantitative approach using a quasi-experimental method. The sample includes 70 students, who are split into two groups: an experimental class and a control class. The results of the increasing cognitive outcomes test were analyzed using two samples assuming equal variance, sample independent t-test, and N-gain to show the influence category. The test results with two samples assuming equal variance got t score 3,47 > 1,99 which is there have the different cognitive learning outcomes and increase shown by sample independent t-test with a significance level of 5% = 0.001 < 0.05, the N-gain two group class is 0.72 and 0.6 show that the experiment class more effective. As such it might be established that using worksheets based on a scientific approach assisted by scaffolding could increase student learning outcomes on temperature heat material.

Optimized protocol for collecting root canal biofilms for in vitro studies

Endodontic retreatment is often necessitated by several factors, including the persistence of microorganisms in the root canal system (RCS). Their complex organization in biofilms increases their pathogenic potential, necessitating new disinfection strategies. This study aimed to standardize a new in vitro protocol for collecting biofilm from the RCS. Thirty-four bovine incisors were used in the study, divided into two experimental groups with two collection steps each: (a) biofilm collection protocol and (b) absorbent paper points protocol. Twelve specimens from each group were selected for counting colony-forming units (CFUs), while eight specimens were prepared for scanning electron microscopy (SEM). Two additional specimens served as sterilization controls to ensure that experiments were free of contamination. The coronal region was removed and standardized at 15 mm. After preparation with ProTaper up to F5, the apical foramen was sealed with composite resin, and the roots were stabilized with acrylic resin in 1.5-mL Eppendorf tubes. The specimens were sterilized and inoculated with Enterococcus faecalis NTCT 775 every 24 h for 21 days. After this period, each group underwent biofilm collection protocols, and CFU and scanning electron microscopy (SEM) data were analyzed. The Shapiro–Wilk test was performed to assess the normality of log-transformed data, and the results indicated a normal distribution for all groups, allowing parametric testing. The Levene test was used to evaluate the equality of variances. The proposed biofilm collection method yielded significantly higher CFU counts compared with the absorbent paper points method, particularly when analyzed on a log₁₀ scale. An independent samples t-test confirmed a statistically significant difference between the two methods (p < 0.0001). The proposed protocol achieved an efficiency rate of 95.85 % ± 1.15 %, whereas the absorbent paper points protocol yielded a lower efficiency of 5.46 % ± 1.37 %. Therefore, the biofilm collection protocol proposed in this study proved to be more effective for biofilm removal from the RCS.

The effects of the SARS-CoV-2 pandemic on the delivery of maternal and child health services in South Africa

ObjectiveThe COVID-19 pandemic severely interrupted the functioning of healthcare systems, negatively affecting the global provision of maternal and child health (MCH) services. This study aims to specify the effects of COVID-19 on these services in the Gauteng province (South Africa) and to put forward context-specific recommendations aimed at augmenting them and ensuring ongoing uninterrupted coverage, even and especially during pandemics. MethodsIn this quantitative study, a retrospective review of District Health Information System data routinely collected between February 2019 and March 2021 was conducted, comparing performance of the relevant indicators across the two-year span. The data were analyzed using Stata 16 statistical software (StataCorp). The two sample t-test with equal variance and the Mann-Whitney test were applied to evaluate the equality of the indicators. ResultsRoutine MCH services were negatively impacted, with marked declines in all relevant indicators from the onset of the pandemic. There was a statistically significant decline in cervical cancer coverage and maternal postnatal visits within six days of delivery. While declines in the other critical indicators were likewise observed, they were not statistically significant. ConclusionThe South African response to the pandemic had negative repercussions on all MCH services in the Gauteng province. The lessons to be drawn from the pandemic experience should help to strengthen health system capacities, boost service provision, and mitigate future damage to the healthcare system.

KEMAMPUAN BERPIKIR KREATIF MENGGUNAKAN PMRI PADA SISWA SMP

The purpose of this study is to identify the impact of creative thinking skills using PMRI on grade VIII students. The method used is an experimental method with a pretest-posttest control research design group. The research sample involved the random selection of two classes, namely class VIII.6 (Experimental Class) with a total of 29 students and class VIII.3 (Control Class) with the same number of students. Data was collected using documentation methods, observation sheets, and essay tests. The results of this study obtained the average score of the experimental class which was 87 and the average of the control class 76. Then the average results of students' creative thinking skills for the four indicators were obtained in the experimental class of 77% which was categorized as good and the control class had an average of 60% which was categorized as adequate. The data was processed using Soffware SPSS version 25. From Equal Variances Assumed and Equal Variances Not Ascetic, the value of sig (2-tailed) is 0.000 0.05, then it is rejected and accepted. So that the ability to think creatively using PMRI in students has a good effect on the learning process of junior high school students

Management of Agile Methodologies for the Development of Competencies of University Students in the Peruvian Context

The fundamental purpose of this research work was to explain how the management of agile methodologies for the development of competencies of university students in the Peruvian context. Based on this question, it has been hypothesized that agile methodologies significantly help the development of students' competencies. This is complemented by a quantitative approach study, with a quasi-experimental design of the "Design with pre-test - post-test with experimental groups and control groups" model. The students of the one Peruvian University were considered as the study population, of which the students of the Faculty of Initial Education were taken as a study sample, within which 100 students participated as an experimental group. 100 from V, VII, X cycle and as a control group 100 students from II, III, and IV cycle respectively. Therefore, as the main result, it is evident that, with a bilateral significance of .000 less than the predetermined significance of 0.05 and a result of F = 1.013, they confirm that the first condition of equality of variances is met and thus establish the Test of the General Hypothesis or HG according to the normal "Z" equal to 8.965, in the case of two independent samples and a difference of 3.81 plus Gl = 51 degrees of freedom and assuming a 95% confidence level, the hypothesis is rejected null and the alternative Hypothesis is accepted, concluding that agile methodologies significantly help the development of students' competencies with a significance of pv ,000..

Comparative evaluation of cranberry extract and sodium fluoride as mouth rinses on S. mutans counts in children: a double-blind randomized controlled trial.

Recently, research in the field of caries prevention is emphasizing upon identification of edible non-toxic compounds that can interfere with the formation of cariogenic biofilm. This trial aimed to assess the effectiveness of non-dialyzable material (NDM) containing cranberry mouth rinse (C-MR) on the Streptococcus mutans (S. mutans) counts and compare with that of a sodium fluoride (F-MR) mouth rinse. 280 children (8-12years old) were enrolled in this double-blind single center, parallel, one-month, IRB/IEC approved non-inferiority trial. The participants fulfilling the inclusion criteria were randomly allocated into one of the two groups: C-MR and F-MR. All participants were given verbal and written instructions about at-home mouth-rinsing regimen under parental supervision for a month. Dental plaque samples were collected before and after a month of mouth-rinsing and subjected to culture techniques. S. mutans counts were assessed and compared in both groups. Primary outcome was the difference in the S. mutans counts between two interventions. Both intention-to-treat (ITT) and per-protocol analysis were carried out using two-sample t test with equal variance. The mean S. mutans counts (after log transformation) in C-MR group were: 14.66 (90% CI 14.4,14.9) at baseline and 12.85 (90% CI 12.5, 13.2) colony-forming units/ml (CFU/ml) at one-month post intervention (p = 0.001); while these counts were 14.69 (90% CI 14.5, 14.9) at baseline and 12.71 (90% CI 12.3, 13.1) at one-month intervention in F-MR groups (p = 0.001). ITT analysis showed an inter- group difference of 0.14CFU/ml (90% CI -0.32,0.59) in post-SM counts between groups (p = 0.629). The study demonstrated that the cranberry mouth rinse was non-inferior to the fluoride mouth rinse in terms of S. mutans levels change. Cranberry-based mouth rinse can be used effectively to reduce the S. mutans counts in children. Registration number in case of Clinical Trials-CTRI/2019/05/019395.

Gender Differences in Usage of Pathao’s Two-Wheeler Services

The study tests the significant difference in usage patterns of Pathao Services between two different groups: male and female. In this context, the Independent Samples t-Test has been used to test equality in the mean usage of Pathao Services for both groups with and without the assumption of equal and unequal variances. We tested the sample of 397 participants, and the variance between these groups was found to be unequal by the Levene's Test showing the significant difference. The results reveal a statistically significant mean difference in the use of Pathao Services between the two groups. Precisely, the average of difference for 0.199, at 95% confidence interval, falls within a range of 0.087 to 0.310 when variances are considered to be equal and within a range of 0.073 to 0.325 when variances are taken to be unequal. As a matter of fact, the p-values for both tests were below the conventional alpha level of 0.05, meaning the differences observed are significant. The results derived from unequal variances tests were considered more reliable because of the significant F-value obtained from Levene's Test. These results therefore indicate that one group is using Pathao Services more than the other. The significant differences of usage would require further examination of demographic, socio-economic, or even behavioral reasons responsible for these differences and might be useful in service provision and intervention. This thus calls for more research to find the root causes of such and perhaps inform strategies to help improve service engagement across diverse user groups.

The Effect of Using Canva-Based Media Usage on Geography Learning Outcomes of Class X Students at UNPATTI Laboratory High School

This study aims to determine the effect of using Canva digital media on the geography learning outcomes of tenth-grade students on the lithosphere material at UNPATTI Laboratory High School. This research employs an experimental method with a control group and an experimental group design. The research sample consists of 28 students divided into two groups: the control group, which used conventional learning methods, and the experimental group, which used Canva. The results of the independent t-test shown in the table indicate a significant difference between the learning outcomes of the control group and the experimental group. The Levene's Test showed an F value of 0.804 with a significance value (Sig.) of 0.378, indicating that the assumption of equal variances is acceptable. In the t-test for mean comparison, the obtained t value was -2.651 with degrees of freedom (df) of 26 for the assumption of equal variances, and 25.547 for the assumption of unequal variances. The two-sided significance value, which was less than 0.05 (0.013 and 0.014 respectively), indicates a significant difference between the two groups. The mean difference between the two groups was -5.857, showing that the learning outcomes of the control group were significantly lower than those of the experimental group. The results of the independent t-test showed a significant difference between the learning outcomes of the two groups, with the experimental group showing higher learning outcomes. These findings suggest that using Canva as a learning tool can enhance learning outcomes for tenth-grade students on lithosphere material. This study supports the literature stating that interactive technology-based learning approaches can positively impact learning outcomes. Therefore, the use of Canva in learning can be considered an effective strategy to improve educational quality.

Default Bayes Factors for Testing the (In)equality of Several Population Variances

Testing the (in)equality of variances is an important problem in many statistical applications. We develop default Bayes factor tests to assess the (in)equality of two or more population variances, as well as a test for whether a population variance equals a specific value. The resulting test can be used to check assumptions for commonly used procedures such as the t-test or ANOVA, or test substantive hypotheses concerning variances directly. We show that our Bayes factor fulfills a number of desiderata. Researchers may have directed hypotheses such as σ12>σ22, they may want to extend H0 to have a null-region, or wish to combine hypotheses about equality with hypotheses about inequality, for example σ12=σ22>(σ32,σ42). We extend our Bayes factor test to allow for these deviations from our proposed default and illustrate it on a number of practical examples. Our procedure is implemented in the R package bfvartest.