The annual NFL Super Bowl is the most widely watched sporting event in the United States each year. In recent years, there has been a great deal of interest in the ads that appear during the game. These ads vary in length, with most lasting 30 seconds or 60 seconds. The file SuperBowlAdScore contains the ad length and ad scores from a recent Super Bowl.

Decide whether the data appear to be approximately normally distributed by

a. Comparing data characteristics to theoretical properties.

b. Constructing a normal probability plot.