[EX02-170] A Champions Tour professional golfer is not expected to play in all the available tournaments in the course of a season. The number of tournaments played by each of the 2004 tour’s top 50 money leaders is shown on page 126.

a. Construct a grouped frequency distribution showing the number of tournaments played using group intervals 9–11, 11–13, . . . 29–31;

the class midpoints; and the associated frequency counts.

b. Find the mean, variance, and standard deviation of the number of tournaments played both with and without using the grouped distribution.

c. Compare the two sets of answers you obtained in part

b. What percent is the error in each case?

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