At the U.S. Open Tennis Championship a statistician keeps track of every serve that a player hits during the tournament. The lower quartile of a particular player's serve speeds was reported to be 99 mph. Which of the following interpretations of this information is correct?
A) 25% of the player's serves were hit at 99 mph.
B) 75% of the player's serves were hit at speeds less than 99 mph.
C) 99 serves traveled faster than the lower quartile.
D) 75% of the player's serves were hit at speeds greater than 99 mph.

Question

Quizplus · Accepted Answer

The lower quartile (or first quartile) indicates that 25% of the player's serves were hit at speeds less than 99 mph, meaning 75% were hit at speeds greater than 99 mph.

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