Question: 35 students with the number of credits taken listed; 14, 7, 13, 11, 10, 10, 8, 18, 13, 13, 14, 8, 16, 14, 14, 12, 10, 12, 12, 12, 4, 12, 17, 12, 7, 11, 15, 14, 12, 12, 10, 12, 16, 12, 10

6 out of 35 smoke 10 out of 35 married

a. Construct a 95% confidence interval for population mean for the average number of credits taken.

b. What is the sample size with a margin of error of .05 credits for mean average.

c. Estimate the proportion of smokers within a 4% margin of error and 99% confidence.

d. Estimate the proportion of married students with in a 5% margin of error and 90% confidence.