6.16The Super Bowl is a big viewing event watched by close to 200 million Americans, so it is also a big event for advertisers. The file [Super Bowl Ad Ratings] contains the rating of ads that ran between the opening kickoff and the final whistle.

Source: Data extracted from admeter.usatoday.com/results/2019.

For ads that ran before halftime and ads that ran at halftime or after separately:

Decide whether the data appear to be approximately normally distributed by

1. Comparing data characteristics to theoretical properties.
2. Constructing a normal probability plot.