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.

Source: Data extracted from C. Woodyard, “Funny Bone Wins Out,” USA Today, February 6, 2016, p. 4B.

For the 30-second ads and the 60-second ads separately:

a. Compute the mean, median, and mode.

b. Compute the variance, standard deviation, range, and coefficient of variation.

c. Are the data skewed? If so, how?

d. Based on the results of (a) through (c), what conclusions can you reach about the scores of 30- and 60-second ads?