Refer to given Exercise, in which the ages for the highest paid 50 CEOs of America's top 500 companies were given. These data are in the ceodata08 dataset for this book.

a. Find the mean and standard deviation for these ages.

b. Recall that the range should be equivalent to 4 to 6 standard deviations for bell-shaped data. Determine whether or not that relationship holds for these ages.

c. Find the z-scores for the ages of the youngest and oldest CEO. Are they about what you would expect? Explain.

Exercise
companies in the United States (Data source: http://www.forbes.com/ lists/2009/12/best-boss-09_CEO-Compensation_ CompTotDisp.html). These data are part of the ceodata08 dataset on the companion website.

42, 47, 48, 49, 49, 50, 50, 50, 50, 51, 51, 51, 52, 54, 54, 55, 55, 55, 55, 56, 57, 57, 57, 57, 57, 58, 58, 59, 59, 60, 60, 60, 61, 61, 62, 62, 62, 62, 62, 63, 63, 64, 64, 64, 64, 67, 67, 69, 74, 78

a. Create a histogram for these ages.

b. Create a stem-and-leaf plot for these ages.

c. Create a dotplot for these ages.

d. Describe the shape of this dataset.

e. Are there any outliers in this dataset?

f. In general, do you think that outliers would be more likely to occur in the salaries of heads of companies or in the ages of heads of companies? Explain.