NFL data from the 2015 football season reported the number of yards gained by each of the league’s 488 receivers:

The mean is 274.73 yards, with a standard deviation of 327.32 yards.
a) According to the Normal model, what percent of receivers would you expect to gain more yards than 2 standard deviations above the mean number of yards?
b) For these data, what does that mean?
c) Explain the problem in using a Normal model here.

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# of Receivers 200 150 100 50 1 T -100 400 900 Yards 1400 1900