At the US Open Tennis Championship a Statistician Keeps Track of Every

Multiple Choice

At the U.S. Open Tennis Championship a statistician keeps track of every serve that a player hits during the tournament. The statistician reported that the mean serve speed of a particular player
Was 96 miles per hour (mph) and the standard deviation of the serve speeds was 9 mph. Using the
Z-score approach for detecting outliers, which of the following serve speeds would represent
Outliers in the distribution of the playerʹs serve speeds?
Speeds: 65 mph, 105 mph, and 114 mph

A) None of the three speeds is an outlier.
B) 65 and 105 are both outliers, but 114 is not.
C) 65 is the only outlier.
D) 65, 105, and 114 are all outliers.