If the population average is 45,the sample mean is 50,and the standard error of the mean is 5,what is the observed z value?
A)0
B)-0.1
C)1
D)-1

Question

Quizplus · Accepted Answer

The formula for calculating the z-score is:

z = (sample mean - population mean) / standard error of the mean

Plugging in the given values, we get:

z = (50 - 45) / 5
z = 1

Therefore, the observed z value is 1, option (C).

If the Population Average Is 45,the Sample Mean Is 50,and