A set of N = 8 scores has a mean of µ = 11.If 16 points are added to one of the scores,what is the new value for the population mean?
A)10
B)11
C)12
D)13

Question

Quizplus · Accepted Answer

Adding 16 points to one of the scores increases the total sum of the scores by 16. Since the original mean is 11 for 8 scores, the total original sum is 8 * 11 = 88. Adding 16 to the total sum gives 88 + 16 = 104. The new mean is 104 / 8 = 13.

A Set of N = 8 Scores Has a Mean