A population of N = 7 scores has a mean of µ = 10.If one score with a value of X = 4 is removed from the population,what is the value for the new mean?
A)70/6=11.7
B)66/6=11.0
C)70/7=10.0
D)66/7=9.4

Question

A population of N = 7 scores has a mean of µ = 10.If one score with a value of X = 4 is removed from the population,what is the value for the new mean?​
A)​70/6=11.7
B)​66/6=11.0
C)​70/7=10.0
D)​66/7=9.4

Quizplus · Accepted Answer

The total sum of the original population is N * µ = 7 * 10 = 70. Removing one score of 4 gives a new total of 70 - 4 = 66. With one score removed, the new N = 6, so the new mean is 66 / 6 = 11.0.

A Population of N = 7 Scores Has a Mean