Refer to The Sport Journal (Winter 2007) article on a new method for ranking the driving performance of PGA golfers, presented in Exercise 2.66 (p. 62). Recall that the method incorporates a golfer's average driving distance (yards) and driving accuracy (percentage of drives that land in the fairway) into a driving performance index. Data on these three variables for the top 40 PGA golfers are saved in the PGA file. Determine which of the variables-driving distance, driving accuracy, and driving performance index-are approximately normally distributed?