5. In a survey of men in the U.S. (ages 20-29), the mean height was 69.4 inches with a standard deviation of 2.9 inches. (a) What height represents the 90th percentile? (b) What height represents the first quartile?_ 6. For a sample of n = 100, find the probability of a sample mean being greater than 24.3 when u = 24 and 0 = 1.25. 7. The mean annual salary for flight attendants is about $65, 700. A random sample of 48 flight attendants is selected from this population. What is the probability that the mean annual salary of the sample is less than $63,400? Assume o = $14,500 8. Construct the indicated confidence interval for the population mean u: c = 0.95, x = 31.39, o = 0.8, n = 82 9. In 36 randomly selected seawater samples, the mean sodium chloride concentration was 23 cubic centimeters per cubic meter. Assume the population standard deviation is 6.7 cubic centimeters per cubic meter. (a) Construct 95% confidence interval for the population mean. (b) What is the margin of error?_ (c) What is the sample mean? 10. Construct the indicated confidence interval for the population mean u: c = 0.95, x = 13.4, s = 0.85, n = 8 1 1. In a random sample of five people, the mean driving distance to work was 22.2 miles and the standard deviation was 5.8 miles. (a) Construct a 95% confidence interval for the population mean. (b) What is the margin of error