13.To select 10 students out of the class of 40 students, I select every 4th name from the roster beginning with the 2nd student. What type of sample is this?_______

A. Multistage Sample

B. Systematic Random Sample

C. Stratified Random Sample

D. Cluster Sample

E. Simple Random Sample

14.Calculate the mode, mean, and median of the following data: 18,8,14,23,18,19,18,16

Mode =_______ Mean = _______Median =_______

15.A public opinion poll in Ohio wants to determine whether reg-istered voters in the state approve of a measure to ban smoking in all public areas. They randomly select 50 voters from each county in the state and ask whether they approve or disapprove of the measure.

This is an example of________

A. SIMPLE RANDOM SAMPLE

B. STRATIFIED RANDOM SAMPLE

At a party there are 30 students over age 21 and 20 students under age 21. You randomly select 3 of those over 21 and 2 of those under 21 to interview about attitudes toward alcohol.

This is an example of________

A. STRATIFIED RANDOM SAMPLE

B. SIMPLE RANDOM SAMPLE

The Ministry of Health in the Canadian Province of Ontario conducted the Ontario Health Survey by conducting interviews with 30,000 randomly selected men and 35,000 randomly selected women who reside in Ontario.

This is an example of________

A. SIMPLE RANDOM SAMPLE

B. STRATIFIED RANDOM SAMPLE