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
B)66/7
C)66/6 = 11
D)Cannot be determined from the information given

Question

Quizplus · Accepted Answer

To find the new mean after removing one score with a value of X = 4, we need to subtract 4 from the current sum of scores and divide by the new sample size, which is N-1 = 6.

New sum of scores = (N * mean) - X = (7 * 10) - 4 = 66 
New mean = New sum of scores / (N-1) = 66 / 6 = 11

Therefore, the value for the new mean is 11.

A Population of N = 7 Scores Has a Mean