The following table shows the approximate number of males of

The following table shows the approximate number of males of Hispanic origin employed in the United States in a certain year, broken down by age group.

(a) Use the rounded midpoints of the given measurement classes to compute the expected value and the standard deviation of the age X of a male Hispanic worker in the United States. (Round all probabilities and intermediate calculations to two decimal places.)

(b) In what age interval does the empirical rule predict that 68 percent of all male Hispanic workers will fall? (Round answers to the nearest year.

Solution