QUESTION 1

Which confidence level will provide the widest interval?

A. 70%

B. 85%

C. 95%

D. 99%

QUESTION 2

We're trying to find a range of values for the proportion of college students who smoke. Would this be an example of point or interval estimation?

A. Point

B. Interval

QUESTION 3

We're trying to find a range of values for the average amount of money that Americans have in a savings account. Would this be an example of point or interval estimation?

A. Point

B. Interval

QUESTION 4

We're trying to find a range of values for which a true percent of people who have had twins. Which test should we use?

A. t-test

B. z-test

C. confidence interval for

D. confidence interval for P

QUESTION 5

If we want to find a range of values for which a possible population average would be, we would use

a.t-test

b.z-test

c.confidence interval for

d.confidence interval for P