# Question: A report in The Washington Post April 26 2009 stated

A report in The Washington Post (April 26, 2009) stated that the average age for men to marry in the United States is now 28 years of age. If the standard deviation is assumed to be 3.2 years, find the probability that a random sample of 40 U.S. men would show a mean age less than or equal to 27 years.

## Answer to relevant Questions

A manufacturer of light bulbs claims that its light bulbs have a mean life of 700 hours and a standard deviation of 120 hours. You purchased 144 of these bulbs and decided that you would purchase more if the mean life of ...A trucking firm delivers appliances for a large retail operation. The packages (or crates) have a mean weight of 300 lb and a variance of 2500. a. If a truck can carry 4000 lb and 25 appliances need to be picked up, what is ...Using the phone numbers listed in your telephone directory as your population, randomly obtain 20 samples of size 3. From each phone number identified as a source, take the fourth, fifth, and sixth digits. (For example, for ...Find the test statistic z and the p-value for each of the following situations. a. Ho: µ = 22.5, Ha: µ >22.5; x¯ = 24.5, s = 6, n = 36 b. Ho: µ = 200, Ha: µ < 200; x¯ = 192.5, s = 40, n = 50 c. Ho: µ = 12.4, Ha: µ ...Using the computer output and information in Exercise 8.113, determine the value of the following: a. Hypothesized value of population mean b. Sample mean c. Population standard deviation d. Test statisticPost your question