1)If the decision is to reject the null hypothesis of no difference between two population parameters, z distribution at the .01 significant level, what is the correct statement of the alternate hypothesis and rejection region?

A.1 ? 2 ; z and z negative

B.1 2; z negative

C.1 2; z

D.1 ? 2 ; z and z negative

2)A hypothesis test that involves a small sample requires that we make the following assumption that

A.the region of acceptance will be wider than for large samples

B.the confidence interval will be wider than for large samples

C.the population is normally distributed

D.a larger computed value of t will be needed to reject the null hypothesis

3)The normally distributed AAA battery life is...