a. Do the data indicate that testing students more frequently significantly improved student performance? Test at the .01 level of alpha. b. Compute r2and evaluate it.
An educational psychologist studies 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, and the scores are summarized below.
Frequent Quizzes Two Exams
n = 15 n = 15
M = 72 M = 68
SS = 100 SS = 110
a. Do the data indicate that testing students more frequently significantly improved student performance? Test at the .01 level of alpha.
b. Compute r2and evaluate it.
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