1. An educational psychologist studied the effect of frequent testing on retention of course material. In one of the professor's sections, students are given quizzes each week. The second section receives only two tests during the semester. At the end of the semester, both sections receive the same final exam. The data are presented below. Frequent Quizzes n= 15 Two Exams n = 15 M = 83 SS = 130 M = 87 SS = 100 a. Test whether or not recycling behaviors differed between groups. Use the hypothesis testing steps & alpha = .05. b. Compute Cohen's d to measure the effect size. c. What was the power for this study?
1. An educational psychologist studied the effect of frequent testing on retention of course material. In one of the professor's sections, students are given quizzes each week. The second section receives only two tests during the semester. At the end of the semester, both sections receive the same final exam. The data are presented below. Frequent Quizzes n= 15 Two Exams n = 15 M = 83 SS = 130 M = 87 SS = 100 a. Test whether or not recycling behaviors differed between groups. Use the hypothesis testing steps & alpha = .05. b. Compute Cohen's d to measure the effect size. c. What was the power for this study?
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Transcribed Image Text:1. An educational psychologist studied the effect of frequent testing on retention of course material. In one of the
professor's sections, students are given quizzes each week. The second section receives only two tests during the
semester. At the end of the semester, both sections receive the same final exam. The data are presented below.
Frequent Quizzes
Two Exams
n = 15
n= 15
M = 87
M = 83
SS = 100
SS = 130
a. Test whether or not recycling behaviors differed between groups. Use the hypothesis testing steps & alpha
.05.
b. Compute Cohen's d to measure the effect size.
c. What was the power for this study?
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