1.We are interested in conducting a study in order to determinewhat percentage of voters of a state would vote for the incumbentgovernor. What is the minimum size sample needed to estimate thepopulation proportion with a margin of error of +/-0.08 at 95%confidence?

A.301

B.150

C.300

D.151

2.We have created a 95% confidence interval for the populationmean with the result [10, 15]. What decision will we make if wetest H0: m = 16 versus H1: m ¹ 16 at 10% level of significance?

A.Fail to reject H0 in favor of H1

B.Reject H0 in favor of H1

C.We cannot tell what our decision will be from the informationgiven

D.Accept H0 in favor of H1

3.Suppose we want to test H0: m ³ 28 versus H1: m < 28. Whichone of the following possible sample results based on a sample ofsize 36 is most likely to reject H0 in favor of H1?

A.Sample mean = 26, sample standard deviation = 9

B.Sample mean = 24, sample standard deviation = 4

C.Sample mean = 28, sample standard deviation = 2

D.Sample mean = 25, sample standard deviation = 6

4.If a null hypothesis is rejected at the 5% level ofsignificance, it

A.will never be tested at the 1% level

B.will always be rejected at the 1% level

C.may be rejected or not rejected at the 1% level

D.will always be accepted at the 1% level