Question 4 (20 points)

An instructor of a math course would like to know whether requiring students to do regular assignments would help them. He split his class into two groups, one that was required to do the assignments, and another not required to do the assignments. At the end of the term, the grade distributions were as follows:

Final Exam Grade

	A	B	C	D	E
Assignment	13	14	16	6	1
No Assignment	12	21	29	24	14

Is there a significant difference between the grade distributions of students who did the assignments and those who did not do the assignments? Using the five steps of hypothesis testing, test with chi-square at .05. If significant, determine the effect size through Cohen'sw and describe the result.