If your sample mean is 11, your population average is 17, and your standard error of the mean is 3, what is your observed z value?
A)14
B)8
C)−2
D)2.2

Name: If your sample mean is 11, your population average is 17, and your standard error of the mean is 3, what is your observed z value? A)14 B)8 C)−2 D)2.2
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Question

Quizplus · Accepted Answer

The observed z value can be calculated using the formula: 
z = (sample mean - population mean) / standard error of the mean
In this case, plugging in the values, we get:
z = (11 - 17) / 3
z = -2

If Your Sample Mean Is 11, Your Population Average Is