Question

A population has mean 12 and standard deviation 4. Round the answers to two decimal places as needed. Find the z-score for a population value of 21.

Answer 1

To find the z-score for a population value of 21, we can use the formula:

z = (x - μ) / σ

where:

x = population value

μ = mean of the population

σ = standard deviation of the population

In this case, x = 21, μ = 12, and σ = 4.

Substituting the values into the formula:

z = (21 - 12) / 4

z = 9 / 4

z = 2.25

Therefore, the z-score for a population value of 21 is 2.25.

Note:
I hoped this helped in any kind of way.