1. Suppose that the point estimate for the percentage of students who had been to a Philadelphia sports game was 56.4%. If 200 students were used for this sample, find the margin of error using a 95% confidence level.

A. 3.5%

B. 5.8%

C. 6.9%

D. 9.0%

2. Suppose that the point estimate for the percentage of students who work out regularly (at least 3 times per week) is 72.5%. If 300 students were used for this sample, find the margin of error using a 90% confidence level.

A. 2.6%

B. 4.2%

C. 5.1%

D. 6.6%

3. Suppose that the point estimate for the percentage of students who have been to Europe is 8.6%. If 150 students were used for this sample, find the margin of error using a 99% confidence level.

A. 2.35

B. 4.5%

C. 5.9%

D. 7.3%

4. If you increase your level of confidence from 95% to 99%, what will happen to your margin of error?

A. The margin of error will decrease.

B. The margin of error will increase.

C. The margin of error will stay the same. (Level of confidence does not effect the margin of error.)

5. Which level of confidence below will give you the smallest margin of error?

A. 90%

B. 95%

C. 99%

6. If you increase your sample size, what will happen to your margin of error?

A. The margin of error will decrease.

B. The margin of error will increase.

C. The margin of error will stay the same. (Sample size does not effect the margin of error.)

7. Which level of confidence below is used most often by researchers?

A. 90%

B. 95%

C. 99%

8. After a person computes the margin of error, what should they do to find the confidence interval boundaries?

A. Start with the point estimate and add the margin of error to get the upper boundary of the confidence interval.

B. Divide the margin of error by the point estimate

C. Multiplty the margin of error by the point estimate