If you have a population standard deviation of 9 and a sample size of 144, what is your standard error of the mean?
A)7.5
B)0.75
C)12
D)8

Question

Quizplus · Accepted Answer

The standard error of the mean is calculated by dividing the population standard deviation by the square root of the sample size. Therefore, the standard error of the mean can be calculated as follows: 
Standard error of the mean = 9 / sqrt(144) = 9 / 12 = 0.75. 
The correct choice is B.

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