A radio station claims that the amount of advertising each hour has an a mean of 17

minutes and a standard deviation of 2.5 minutes. You listen to the radio station for 1
hour and observe that the amount of advertising time is 11.75 minutes.

Based on your
observation, what would you infer about the radio station's claim?

The z-score for the value 11.75 is -2.1
Since the z-score would not indicate that 11.75 minutes represents an outlier, there is no evidence that the station's
claim is incorrect.