6. Given a two-tail test of whether the variance of section 105 Exam 1 grades is

Question

6. Given a two-tail test of whether the variance of section 105 Exam 1 grades is different from that of section 106, what would you conclude at the .05 significance level?

A) Reject the null

B) Fail to reject the null

C) Accept the alternative

D) Accept the null

7. Given your conclusion to Question 6, what kind of test should you run if you wanted to compare the average grades between the two sections?

A) t test assuming unequal variances

B) t test assuming equal variances

C) z test of two proportions

D) t test of two dependent samples

Explanation / Answer

A ) Since F value is less than the critical value. So we can accept the Null Hypothesis.

b)

We can use Z test of two proportions.

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