A history professor gives a quiz to his class and records the following scores: 13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20. The mean for this distribution is _________.
A) 12.38
B) 13.42
C) 18.05
D) 11.50

Question

Quizplus · Accepted Answer

To find the mean, add all the scores together and then divide by the number of scores. The sum of the scores is 161, and there are 13 scores. 161 divided by 13 equals 12.38.

A History Professor Gives a Quiz to His Class and Records