What is your effect size?
Schara would like to know whether it is worthwhile to require students to do weekly statistics homework assignments. For one section of the course, homework is assigned, collected, and graded each week. For another section, the same problems are “suggested” each week, but the students are not required to turn in their homework. At the end of the semester, all students take the same final exam. The final grades (in percentages) from the 14 students in the class are as follows:
No Homework Assigned Homework Assigned
80 75 70 95
80 60 90 80
50 85 90 75
60 95
Ans: d = -1.28
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