Mattingly "AI & Prompt Design: The Basics of Prompt Design"
Unit 5 lesson 1
1. Unit 5: Comparing Two Sample Means Lesson 1: The Paired Samples t Test EDER 6010: Statistics for Educational Research Dr. J. Kyle Roberts University of North Texas To Reject or Not to Reject? Next Slide
2. Paired Samples t Test The same people measured on the same construct on two different occasions Pre-test ↔ Post-test (a.k.a., Dependent Samples t Test) Assessing the effectiveness of a reading intervention with 8 students in a single classroom Next Slide
7. Comparing Studies t-crit = 2.093 on 19 df Which study is more likely to produce results that are statistically significant? t-crit = 1.980 on 120 df Study 2 Next Slide N = 20 N = 20 SD = 10 SD = 10 Mean = 90 Mean = 80 Posttest Pretest Study 1 N = 121 N = 121 SD = 10 SD = 10 Mean = 90 Mean = 80 Posttest Pretest Study 2
8. Comparing Studies t-crit = 2.093 on 19 df Which study is more likely to produce results that are statistically significant? Study 2 Next Slide N = 20 N = 20 SD = 10 SD = 10 Mean = 90 Mean = 80 Posttest Pretest Study 1 N = 20 N = 20 SD = 2 SD = 10 Mean = 90 Mean = 80 Posttest Pretest Study 2
9. Comparing Studies t-crit = 2.093 on 19 df Which study is more likely to produce results that are statistically significant? Study 1 Next Slide N = 20 N = 20 SD = 10 SD = 10 Mean = 90 Mean = 80 Posttest Pretest Study 1 N = 20 N = 20 SD = 10 SD = 10 Mean = 85 Mean = 80 Posttest Pretest Study 2
10. Factors Affecting t-calc 1. The magnitude of the difference between the two means 2. The “spreadoutness” of the scores 3. The number of people in the study 4. The level at which α is set Just like the Single-Sample t Test Next Slide
11. Unit 5: Comparing Two Sample Means Lesson 1: The Paired Samples t Test EDER 6010: Statistics for Educational Research Dr. J. Kyle Roberts University of North Texas To Reject or Not to Reject?