The article in Time magazine7 (Exercise 6.52) also reported that 80% of men and 62% of women put in more than 40 hours a week on the job. Assume that these percentages are correct for all Americans, and that a random sample of 50 working women is selected.
a. What is the average number of women who put in more than 40 hours a week on the job?
b. What is the standard deviation for the number of women who put in more than 40 hours a week on the job?
c. Suppose that in our sample of 50 working women, there are 25 who work more than 40 hours a week. Would you consider this to be an unusual occurrence? Explain.