A population distribution has σ = 6.What position in this distribution is identified by a z-score of z = +2.00?
A)two points above the mean
B)two points below the mean
C)twelve points above the mean
D)twelve points below the mean

Question

A population distribution has σ = 6.What position in this distribution is identified by a z-score of z = +2.00?​
A)​two points above the mean
B)​two points below the mean
C)​twelve points above the mean
D)​twelve points below the mean

Quizplus · Accepted Answer

A z-score of +2.00 represents a point that is two standard deviations above the mean. Since the standard deviation is σ = 6, this means the point is 2 x 6 = 12 points above the mean. Therefore, the correct answer is choice C.

A Population Distribution Has σ = 6