Two random samples of 40 students were drawn independently from two populations of students. Assume their aptitude tests are normally distributed and assume the variances of each population are equal. The following statistics regarding their scores in an aptitude test were obtained:

x bar 1 = 74

s1 = 8

x bar 2 = 71

s2 = 7

Test at the 5% significance level to determine whether we can infer that the two population means differ. What is the conclusion from your test?

a.

Do not accept the null hypothesis

b.

None of these answers are correct

c.

Do not reject the null hypothesis

d.

Reject the null hypothesis

e.

Accept the alternate hypothesis