Abstract
The purpose of this study is to determine the statistical literacy levels of performance related to sampling concept of middle school students with the Partial Credit Model in Rasch measurement. Within this scope, a Statistical Literacy Test for the Sampling Concept (OKYIOT), which is composed of 12 open ended questions was developed. A total of 60 middle school students in Trabzon in 2010-2011 academic year participated in the study. Firstly questions created about sampling and according to statistical literacy hierarchy rubrics were created. Students were asked to answer questions related to sampling. Partial Credit Model was used as the measurement model for the examination of construct validity. All analyses were completed using Winsteps 3.72 computer software. Reliability figures were also satisfactory (RI = 0,91; RP = 0,81; Cronbach alpha = 0,80). The results of this study demonstrated that works in accordance with the purpose of OKYIOT test items and student responses. In this study students often concentrated on the third level of statisticial literacy framework. This result is compatible with other studies.
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