A population has a mean $\mu = 21$ and standard deviation $\sigma = 4$ Find the z -score for a population value of 29 .
A) 0.5
B) 7.3
C) 2
D) 8

Question

A population has a mean $\mu = 21$ and standard deviation $\sigma = 4$ Find the  z -score for a population value of 29 .
A)  0.5 
B)  7.3 
C) 2
D) 8

Quizplus · Accepted Answer

The z-score is calculated using the formula $z = \frac{(X - \mu)}{\sigma}$, where $X$ is the population value, $\mu$ is the mean, and $\sigma$ is the standard deviation. Substituting the given values, $z = \frac{(29 - 21)}{4} = \frac{8}{4} = 2$.

A Population Has a Mean μ=21\mu = 21μ=21 And Standard Deviation σ=4\sigma = 4σ=4

A Population Has a Mean $\mu = 21$ And Standard Deviation $\sigma = 4$