If you have a population standard deviation of 9 and a sample size of 81, what is your standard error of the mean?
A)−3
B)2
C)1
D)9

Question

Quizplus · Accepted Answer

The standard error of the mean formula is:

SE = σ/√n

where σ is the population standard deviation and n is the sample size.

Substituting the given values, we get:

SE = 9/√81 = 9/9 = 1

Therefore, the standard error of the mean is 1, which corresponds to choice C.

If You Have a Population Standard Deviation of 9 and a Sample