Mayang Purbaningrum, Elly Arliani
Various mathematical literacy tests regarding statistics need to be developed so that teachers know students' mathematical literacy abilities in that material and to enrich test item references. This study aimed to develop a valid and reliable mathematical literacy test on the statistics topic, especially the bivariate data that could describe the features of the test items to measure the mathematical literacy skills of the eleventh-grade vocational high school students. Formative assessment was employed in this developmental study. There were 92 research participants involved in the study chosen using the cluster random sampling technique. Data were obtained by using document reviews, interviews, and walkthroughs. The obtained data were analyzed descriptively. Results demonstrated that mathematical literacy tests that included 12 multiple-choice questions and 3 essays were valid, reliable, and capable of measuring mathematical literacy skills. The validity test resulted in 0.83-0.92, which was in the high category. The estimated reliability for the items with multiple choice format was 0.898; for the essay, it was 0.772, which was reliable. The parameter estimation results for the difficulty level were 0.47-0.99 with easy and moderate categories and 4 tasks in the easy category. The parameter estimation of the discrimination power of the items was 0.23-0.92 with moderate and good categories. The distractor in each question was functioning properly. The questions that have been developed in this research can be used for mathematical literacy tests because they are valid and reliable, the difficulty level is mostly moderate, the discrimination power is mostly in the good category, and the distractors function well. © 2025 Author(s).
Mathematics Education, Universitas Negeri Yogyakarta, Sleman, Indonesia
