Hi, please answer all the questions. I need it by 8:35pm. Thank you.

1. Identify the kind of sample that is described.

A football coach takes a simple random sample of 3 players from each grade level to ask their opinion on a new logo.

A. Stratified

B. Convenience

C. Cluster

D. Systematic

2.

Police at a sobriety checkpoint pull over every fifth car to determine whether the driver is sober.

A. Convenience

B. Systematic

C. Cluster

D. Stratified

3.

In a clinical trial of the cholesterol drug Lipitor, sujects were given a random number generated by a computer. The subjects with an even number were assigned to be in the drug trial group, and those with an odd number were assigned to be in the control group (0 mg dose).

A. Convenience

B. Simple random sample

C. Startified

D. Cluster

4. Suppose a random sample of size 80 is selected form a population with sigma space equals space 10 .

Find the value of the standard error of the mean if the population size is N = 500. (Use the finite population correction factor if appropriate.) Round the value to 2 decimal places. Show the steps in your solutions.

A. 1.46

B. 1.03

C. 1.21

D. 1.37