9 A professor wondered if her two sections scored significan

9. A professor wondered if her two sections scored significantly differently on the midterm exam. Section 01 had 30 students and the average score was 85. Section 02 had 32 students and the average score was 80. The pooled standard deviation was 2. Conduct a t-test to test the hypothesis that the mean was different for the two sections.

a. State the null and research hypothesis.

Ho:

H1:

b. Calculate the t statistic

c. Determine the critical values.

i. DF:

ii. 1 or 2 tailed:

iii. Alpha:

iv. CV(s):

d. Compare the statistic (t) to the critical values.

e. What is your decision? f. What is your conclusion?

Solution