If the standard deviation of a population is 50 and we take a sample of size 25, then the standard error (the standard deviation of the sample mean) is
A) 10.00
B) 5.00
C) 250.00
D) 2.00

Question

Quizplus · Accepted Answer

The standard error (SE) of the sample mean is calculated by dividing the population standard deviation by the square root of the sample size. 
SE = 50 / sqrt(25) = 50 / 5 = 10.00. Therefore, the answer is choice A.

If the Standard Deviation of a Population Is 50 and We