14. In a sociology course, one group of students had access to a set of lectures online in addition to the classroom lectures, and the other group of students did not have access to the online lectures. In each case an exam was given after the lectures. Here are the scores.

Classroom and online: 61, 71, 61, 100, 94

Classroom only: 64, 61, 56, 53, 54

a) Test if the variances of the scores are different between the two groups using = 0.05.

b) Do the data suggest that the online access improved the average test scores? Conduct a test using = 0.05 based on the result on equality of variances obtained in part (a).