Linear Regression Coefficient Research Articles

Air-assisted solidified floating organic drop microextraction method based on green supramolecular solvent for arsenic and selenium qantification in water and food samples

A supramolecular solvent (SUPRAS) was prepared from undecanoic acid and tetrabutylammonium hydroxide and used as an extraction solvent. A fast microextraction approach based on air-assisted solidified floating organic drop (AA-SFODME) coupled to a hydride generation atomic absorption spectrometer (HG-AAS) for arsenic and selenium traces determination in water and food samples was developed. The air bubbles enhanced the extraction efficiency by reducing both the time and the required chemical amounts. The 2-((4-iodophenyl) diazenyl)-8-hydroxyquinoline (IPHQ) was used as a chelation reagent. The experimental factors that impact extraction efficiency were improved and optimized. The limits of detection (LODs) for arsenic and selenium were 0.09 and 0.07 µg L−1, respectively. Also, the preconcentration factors (PFs) and enhancement factors (EFs) were found to be 100 and 103 for both arsenic and selenium, respectively. The linearity of both two calibration curves ranged from 0.10 to 700 µg L−1, with linear regression coefficients (R2) of 0.9986 and 0.9978, respectively. Finally, the greenness score was determined using two tools: the analytical greenness calculator (AGREE) and the Blue Applicability Grade Index (BAGI). The high greenness scores from these tools can make this method even more environmentally friendly and practical.

Pengaruh Lingkungan Kerja dan Motivasi Kerja Terhadap Kinerja Karyawan Pada PT. HM Sampoerna TBK Di DKI Jakarta

The purpose of this research is to determine and analyze the influence of the work environment and work motivation on employee performance. The research method used was quantitative research method, where variables were measured using a Likert scale. Data collection methods include questionnaires, interviews and documentation. The research was conducted using a validity and reliability sample of 30 people taken from a total population of 385 people, while the research sample was 196 people using the Slovin method. Data processing uses SPSS version 26 software. The data analysis techniques use classical assumption tests, simple linear regression analysis, hypothesis testing, and coefficient of determination. The research results show that partially working environment variables has a significant and positive effect on employee performance. Partially, the work motivation variable has a significant and positive effect on employee performance.

ANALYSIS TO IMPROVE THE PERFORMANCE OF LEDOOKOMBO DISTRICT VILLAGE EQUIPMENT USING MOTIVATION AND JOB TRAINING DISCIPLINE VARIABLES

This research was conducted to determine the influence of work discipline, work motivation and work training on improving the performance of village officials in Ledokombo District. The research method used in this research is a quantitative method with a census sampling method of 117 respondents, using a questionnaire sheet distributed to village officials in Ledokombo District. This research uses multiple linear regression analysis methods, partial tests, and coefficient of determination (R2) tests. And the results of the analysis using SPSS 27 show that the three variables, namely motivational discipline and work training, have a significant influence on the performance of village officials in Ledokombo District. The results of the determination test (r2) were (41.8%) showing the large proportion or percentage contribution of the Discipline, Motivation and Job Training variables to performance. Meanwhile (58.2%) was contributed by other variables not included in this research, for example work burnout, compensation, work commitment and so on.

Pengaruh Kemampuan Komunikasi Terhadap Kinerja Karyawan di Instansi Penerbangan: Studi pada Karyawan di UPBU Kelas 1 Mutiara Sis Al-Jufri Palu

Effective communication is crucial for enhancing efficiency and human resource quality in aviation organizations like UPBU class 1 Mutiara Sis Al-Jufri Palu. Both leaders and employees rely heavily on communication to perform their tasks effectively. This research aims to assess the impact of communication skills on employee performance in this institution. The study employs a quantitative approach, collecting data through questionnaires and literature review. Comprehensive analysis includes testing data validity, reliability, and normality, as well as conducting simple linear regression analysis, partial t-tests, and coefficient of determination (R²) tests to evaluate the relationship between communication skills and employee performance at UPBU class 1 Mutiara Sis Al-Jufri Palu. The findings indicate that communication skills significantly influence employee performance, with an R Square value of 0.629, suggesting that approximately 62.9% of the variability in employee performance can be explained by their communication abilities

Pengaruh Brand Ambassador, Brand Image dan Persepsi Harga Terhadap Keputusan Pembelian Produk Kosmetik Emina

The aim of this research is to analyze the significance of the influence of brand ambassadors, brand image and price perceptions on purchasing decisions for Emina cosmetic products in Surakarta. This research is a survey with data types using qualitative and quantitative data. Data sources use primary data and secondary data. The population in this research are all consumers who use Emina products in Surakarta. The total research sample was 100 people with a sampling technique using purposive sampling. Data analysis uses descriptive analysis, multiple linear regression test, t test, F test and coefficient of determination test. The research results show that brand ambassadors have a significant influence on purchasing decisions for Emina cosmetic products in Surakarta, brand image has no significant influence on purchasing decisions for Emina cosmetic products in Surakarta and price perceptions have a significant influence on purchasing decisions for Emina cosmetic products in Surakarta. The F test results show a calculated F value of 38.275 with a significance value (p-value) of 0.000 < 0.05. The coefficient of determination test result (adjusted R2) is 0.530, meaning that the contribution of the independent variables to the dependent variable is 53%.

Pengaruh Strategi Promosi Melalui Media Sosial, Kualitas Pelayanan dan Word Of Mouth Terhadap Keputusan Pembelian HP OPPO di Kota Medan

This study aims to determine the influence of promotional strategies through social media service quality and word of mouth on the decision to buy oppo cellphones in medan city. This research uses quantitative descriptive research methods. Data analysis techniques use classical assumption tests, multiple linear regression analysis, f tests, t tests and coefficients of determination. The population used was taken from OPPO HP users in the city of Medan, while the sample used was taken from the formula of Hairs et al, namely the sample size specified was 21 x 5, which is 105, then the sample used was 105. The results showed that partially the promotion strategy through social media service quality and word of mouth influenced simultaneous purchasing decisions that promotion strategies through social media, service quality and word of mouth influenced purchasing decisions. The magnitude of the coefficient of determination of 0.539 means that the ability of the promotion strategy variable through social media, service quality and word of mouth explains its effect on the purchase decision variable of 53.9%. While the remaining 46.1% are other free variables that were not studied in this study such as price, brand image, consumer satisfaction and others.

The influence of information technology and compensation on the employees performance of the regional revenue and financial management agency

The objectives of this study were 1) to determine the effect of Information Technology on performance at the Regional Financial and Revenue Management Agency (BPKPD) of Tomohon City; 2) To determine the effect of Compensation on employee performance at the Regional Financial and Revenue Management Agency (BPKPD) of Tomohon City; 3) To determine the effect of Information Technology and Compensation simultaneously on employee performance at the Regional Financial and Revenue Management Agency (BPKPD) of Tomohon City. The research method used is quantitative research method. Primary data were obtained through questionnaires distributed to 70 employees as research samples. Research data testing techniques include using validity tests, reliability tests, multiple linear regression model tests, hypothesis tests, and coefficient of determination tests. The results showed that 1) There is a positive functional influence that contributes between Information Technology and employee performance; 2) There is a positive functional influence that contributes between compensation and employee performance; 3) There is a positive functional influence that contributes between Information Technology and Compensation together on Employee Performance.

Correlation between serum trimethylamine-N-oxide and body fat distribution in middle-aged and older adults: a prospective cohort study

BackgroundTrimethylamine-N-oxide (TMAO) is linked with obesity, while limited evidence on its relationship with body fat distribution. Herein, we investigated the associations between serum TMAO and longitudinal change of fat distribution in this prospective cohort study.MethodsData of 1964 participants (40–75y old) from Guangzhou Nutrition and Health Study (GNHS) during 2008–2014 was analyzed. Serum TMAO concentration was quantified by HPLC–MS/MS at baseline. The body composition was assessed by dual-energy X-ray absorptiometry at each 3-y follow-up. Fat distribution parameters were fat-to-lean mass ratio (FLR) and trunk-to-leg fat ratio (TLR). Fat distribution changes were derived from the coefficient of linear regression between their parameters and follow-up duration.ResultsAfter an average of 6.2-y follow-up, analysis of covariance (ANCOVA) and linear regression displayed women with higher serum TMAO level had greater increments in trunk FLR (mean ± SD: 1.47 ± 4.39, P-trend = 0.006) and TLR (mean ± SD: 0.06 ± 0.24, P-trend = 0.011). Meanwhile, for women in the highest TMAO tertile, linear mixed-effects model (LMEM) analysis demonstrated the annual estimated increments (95% CI) were 0.03 (95% CI: 0.003 – 0.06, P = 0.032) in trunk FLR and 1.28 (95% CI: -0.17 – 2.73, P = 0.083) in TLR, respectively. In men, there were no similar significant observations. Sensitivity analysis yielded consistent results.ConclusionSerum TMAO displayed a more profound correlation with increment of FLR and TLR in middle-aged and older community-dwelling women in current study. More and further studies are still warranted in the future.Trial registrationNCT 03179657.

The Influence Of Price And Service Quality On Purchasing Decisions For Cafe Goela Gelato In Pontianak City

This research aims to find out whether there is a relationship between price and service quality. With a positive data collection strategy and a sample size of 100 participants, this research applies associative methodology. Participants must be residents of Pontianak City, aged 17–50 years. Statistical methods used in the analysis include: multiple linear regression, correlation and determination coefficients, simultaneous testing (F test), and partial testing (t test). The data are linear, normally distributed, and show no signs of multicollinearity; these findings were confirmed by standard assumption tests. These variables have a strong relationship with each other, shown by a correlation value of 0.785. Based on the coefficient of determination (R2), the variables included in this study contributed 62% to purchasing decisions, while the remaining 38% was influenced by other factors that could not be explained. Initial research shows that price has no significant effect on purchasing decisions. On the other hand, service quality has a significant influence on purchasing decisions.

The Effect Of Payment Through Quick Response Indonesian Standard (QRIS) On Customer Satisfaction Of Micro, Small And Medium Enterprises (MSMEs) In Riau Province

In the realm of digital payment systems, the adoption of Quick Response Indonesian Standard (QRIS) represents a significant advancement, promising efficiency and convenience in the digital economy. This study investigates the impact of QRIS on customer satisfaction within Micro, Small, and Medium Enterprises (MSMEs) in Riau Province. Through a quantitative approach and purposive sampling of 400 respondents, the research employs multiple linear regression analysis, validity tests, reliability tests, T-tests, and coefficient of determination (R²) using IBM SPSS version 25. The findings indicate a statistically significant positive relationship between QRIS usage and customer satisfaction among MSMEs in Riau Province. The study contributes valuable insights into the digital payment ecosystem's role in enhancing customer satisfaction, offering strategic guidance for businesses and policymakers. The R² value of 0.759 underscores QRIS variables' substantial explanatory power (75.9%) in influencing customer satisfaction within MSMEs, illuminating avenues for further exploration and application in digital payment innovations.

Pengaruh Disiplin Kerja dan Motivasi Kerja terhadap Kinerja Karyawan pada PT XYZ

PT XYZ is a company with a wide network and services for the community. To achieve success in a company, good performance is required, which is based on work discipline and work motivation. The aim of the research is to determine the influence of work discipline and work motivation on employee performance at PT XYZ. This research uses a quantitative approach with nonprobability sampling data collection techniques, namely saturated sampling. The population in this study consisted of all PT XYZ employees, with a total sample of 47 respondents. Primary data was collected using questionnaires in Likert scale units. Data processing uses SPSS 25 software for the tests used are data quality test, classical assumption test, multiple linear regression analysis, hypothesis testing, and coefficient of determination. The results of this research are proven by the results of the partial test (T) on the work discipline variable (X1) showing that there is a positive and significant influence on the employee performance variable (Y) and on the work motivation variable (X2) it also shows that there is a positive and significant influence on the variable employee performance (Y), while the results of the simultaneous test research (F) show that there is a positive and significant influence of the variables work discipline (X1) and work motivation (X2) on employee performance (Y).

Preparation of CoFe@C composite modified electrode for neohesperidin dihydrochalcone sensing and its application in Chinese medicine.

CoFe@C was first prepared by calcining the precursor of CoFe-metal-organic framework-74 (CoFe-MOF-74), then an electrochemical sensor for the determination of neohesperidin dihydrochalcone (NHDC) was constructed, which was stemmed from the novel CoFe@C/Nafion composite film modified glassy carbon electrode (GCE). The CoFe@C/Nafion composite was verified by field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Electrochemical impedance spectroscopy (EIS) was used to evaluate its electrical properties as a modified material for anelectrochemical sensor. Compared with CoFe-MOF-74 precursor modified electrode, CoFe@C/Nafion electrode exhibited a great synergic catalytic effect and extremely increased the oxidation peak signal of NHDC. The effects of various experimental conditions on the oxidation of NHDC were investigated and the calibration plot was tested. The results bespoken that CoFe@C/Nafion GCE has good reproducibility and anti-interference under the optimal experimental conditions. In addition, the differential pulse current response of NHDC was linear with its concentration within the range0.08 ~ 20µmol/L, and the linear regressioncoefficient was 0.9957. The detection limit was as low as 14.2nmol/L (S/N = 3). In order to further verify the feasibility of the method, it was successfully used to determine the content of NHDC in Chinese medicine, with a satisfactory result, good in accordance with that of high performance liquid chromatography (HPLC).

Pengaruh Inovasi Layanan dan Kualitas terhadap Keputusan Nasabah Menabung pada PT BPRS Al-Washliyah Medan

This research aims to determine the influence of service innovation and quality on customers' decisions to save at PT BPRS Al-Washliyah Medan, both partially and simultaneously. This research uses an associative approach. The population taken was all PT BPRS customers, with a total sample of 100 customers taken using the accidental sampling method. The data collection method uses questionnaires by distributing questionnaires, interviews and direct observation. Data analysis in this research uses Multiple Linear Regression Analysis Test, Hypothesis Testing (t Test and F Test), and Coefficient of Determination. Data processing in this research used the SPSS (Statistical Package for the Social Sciences) software program version 29.00. The results of this research partially show that the service innovation variable has a significant effect on customers' decisions to save at PT BPRS Al-Washliyah Medan. The quality variable has a significant effect on customers' decisions to save at PT BPRS Al-Washliyah Medan. Simultaneously, the variables of service innovation and quality have a significant influence on customers' decisions to save at PT BPRS Al-Washliyah Medan.

Pengaruh Digital Payment dan E-Commerce terhadap Perilaku Konsumtif: Studi Kasus pada Mahasiswa Fakultas Agama Islam UMSU

Pengaruh Digital Payment dan E-Commerce terhadap Perilaku Konsumtif: Studi Kasus pada Mahasiswa Fakultas Agama Islam UMSU This research aims to find out the influence of digital payments and e-commerce on consumer behavior (case study of students at the Umsu Islamic Faculty) both partially and simultaneously. This research approach is associative. The population was 1,215 students and the sample was 92 students. The data collection technique in this research uses a questionnaire technique. The data analysis technique in this research uses Multiple Linear Regression Analysis Test, Hypothesis Test (t Test and F Test), and Coefficient of Determination. Data processing in this research used the SPSS (Statistical Package for the Social Sciences) software program version 29.00. Partially, the digital payment variable has a significant effect on consumer behavior. Partially, the e-commerce variable has a significant effect on consumer behavior. Simultaneously, digital payment and e-commerce variables have a significant effect on consumer behavior.

Pengaruh Literasi Keuangan Syariah, Penggunaan Shopee Paylater dan Lifestyle Terhadap Perilaku Konsumtif: Studi Kasus pada Mahasiswa Program Studi Perbankan Syariah UMSU

This research was conducted with the aim of finding out the influence of sharia financial literacy, use of shopee paylater, lifestyle on the consumptive behavior of students in the UMSU Sharia Banking Study Program. The type of approach used is quantitative with an associative type of research. The research population was 190 UMSU Sharia Banking Study Program students, while the sample used was 130 respondents who were the research sample. This research uses Purposive Sampling technique. The data used is primary data and the data collection technique uses a questionnaire via Google Form. The variables used are the independent variables in the form of financial literacy, use of Shopee Paylater and also Lifestyle, while the dependent variable is consumer behavior. The data analysis technique used in this research uses Multiple Linear Regression Test, Hypothesis Test (t Test and F Test), and Coefficient of Determination. Data processing in this research used SPSS (Statistical Package For The Social Sciences) version 29.00 (2024). Based on the research results, it shows that Sharia Financial Literacy has a positive but not significant influence on student consumptive behavior. Using Shopee Paylater has a positive and significant influence on student consumptive behavior. And Lifestyle has a positive and significant effect on student consumption behavior.

The Effect of Return on Equity and Current Ratio on Price to Book Value (Case Study of PT Unilever Indonesia Tbk which is Listed on the Indonesia Stock Exchange for the 2015-2022 Period)

This study aims to find out how Price to Book Value is influenced by Return on Equity and Current Ratio. The focus of the research is PT Unilever Indonesia Tbk, which is listed on the Indonesia Stock Exchange. The sample for this research is the financial statements of PT Unilever Indonesia Tbk from 2015 to 2022. An impossible sample selection method was used. Instead, data analysis is carried out using several techniques. This includes classical assumption tests, correlation tests, multiple linear regression coefficient of determination tests, and partial and simultaneous hypothesis tests. The research results show that Return on Equity (X1) and Current Ratio (X2) do not partially influence Price to Book Value. Apart from that, Return on Equity does not partially affect Price to Book Value (Y) significantly at all

Pengaruh Gaya Hidup dan Income terhadap Financial Management Behavior

In this era of increasingly advanced and easily accessible technology, especially information technology which offers comfort, convenience and speed in accessing various information, we are spoiled by the changes it brings, both positive and negative. This is especially seen among young people or the millennial generation, who tend to be more active in using social media. This research aims to determine the influence of lifestyle and income on financial management behavior in case studies of factory employees located in the MM2100 area, either partially or simultaneously. Sampling was carried out using random sampling technique, resulting in 95 respondents. This research collects data using a questionnaire. The data analysis techniques used include multiple linear regression analysis, hypothesis testing (t test and f test), and coefficient of determination. Data processing was carried out using the SPSS version 26 software program. The results of this research show that lifestyle and income partially or simultaneously have a significant influence on the financial management behavior of factory employees in companies located in the MM2100 area. The results of the R-Square determination test of the influence of lifestyle and income variables on financial management behavior were 94.0%. And the remaining 5.1% is influenced by other variables not included in this research.

The Influence of Leverage, Liquidity and Profitability toward Tax Avoidance in Property and Real Estate Companies Listed on Indonesia Stock Exchange

Tax avoidance is an effort to avoid tax which have an impact on tax liabilities that are carried out by still complying in the tax provisions and do not violate the tax provisions predetermined. The objective of this research is to analyze whether Leverage, Liquidity and Profitability have a significant influence toward Tax Avoidance in Property and Real Estate Companies Listed on the Indonesia Stock Exchange from the year 2020-2022. This research method is using quantitative approach and collection of secondary data through Financial Report listed on the Indonesia Stock Exchange. All of the Property and Real Estate Companies listed on the Indonesia Stock Exchange are the population in this research. 15 companies are taken as the number of samples through purposive sampling method and result in 45 companies in total with three year observations. The data analysis method in this research includes: descriptive statistics, normality test, multicollinearity test, heteroscedasticity test, autocorrelation test, multiple linear regression analysis, t-test, f-test, and coefficient of determination. Based on the data analysis, the findings of this research shows that Leverage partially does not have a significant influence toward tax avoidance. Liquidity partially does not have a significant influence toward tax avoidance. Profitability partially has a significant influence toward tax avoidance. Leverage, Liquidity and Profitability simultaneously have a significant influence toward tax avoidance.

Village Fund Management: Accountability, Transparency, Community Participation

This study aims to determine the effect of accountability, transparency and community participation on the management of funds in Kading Village, Tanete Riaja District, Barru District. The data used in this study are primary data in the form of respondents' assessments of accountability, transparency, community participation and management of village funds. Methods of data collection using questionnaires and literature study. Data analysis techniques using multiple linear regression analysis, t test, F test and coefficient of determination test. The results of the study found that accountability, transparency and community participation had a positive and significant effect on the management of funds for Kading Village, Tanete Riaja District, Barru Regency.

The Influence of Current Ratio and Debt To Asset Ratio on Financial Performance at PT Unilever Indonesia Tbk (Case Study on the Indonesian Stock Exchange for the 2015-2022 Period)

This research was carried out to determine the influence of Current Ratio and Debt Asset Ratio on Financial Performance. The object of the research was carried out at PT Unilever Indonesia Tbk, with types of secondary data taken from the financial reports for 8 years from 2015-2022 which were divided into 3 parts. month. The type of research used is quantitative research with associative descriptive methods, with data collection techniques, namely using documentation techniques. The population in this research is the financial report for the year 2015-2022. The sampling technique in this research uses non-probability sampling. Meanwhile, the data analysis used is the classical assumption test which includes data normalization test, multicollinearity test, heteroscedasticity test and autocorrelation test, correlation test, coefficient of determination test and multiple linear regression, partial and simultaneous hypothesis testing. Based on the results of this research, it shows that the Current Ratio is partial. has a negative and significant effect on Financial Performance. Next, the Debt to Asset Ratio variable has no partial effect on the Financial Performance variable. Current Ratio and Debt to Asset Ratio have a simultaneous influence on the Financial Performance of PT Unilever Indonesia Tbk for the 2015-2022 period