5A Dep_Sample_T_Test_08

5A Dep_Sample_T_Test_08 - StatLab 5A The dependent...

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StatLab 5A: The dependent samples (i.e., repeated-measures or paired-samples) T-test A health psychologist wants to determine if a nutritional workshop would help consumers understand the detrimental health effects of making poor food choices and how to choose healthy, nutritional foods. To test this, he developed a questionnaire to test consumers’ knowledge of nutrition and health effects and selected a random sample of 15 subjects. The psychologist administered this questionnaire to each subject, and then put each subject through the nutritional workshop. After completion of the workshop, he administered the questionnaire to each subject again (i.e. to see if the workshop actually increases consumer knowledge of nutrition and health effects). As a control for memorization and study time, the consumers do not receive their scores after the pre-test. The pre-test and post-test scores for each subject are listed below: Before After Workshop Workshop 69 91.5 46.5 100 75.5 92 94.5 91.5 96.5 100 80.5 89.5 81.5 89.5 89 72.5 56.5 87.5 81.5 90 88.5 96 48.5 100 81 79 65
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