A Population That Consists of 250 Items Has a Mean

Multiple Choice

A population that consists of 250 items has a mean of 37 and a standard deviation of 13. A sample of size 5 is taken at random from this population. The standard error of the sample mean equals (up to three decimal places) :

A) 1.838 .
B) 1.648 .
C) 0.822 .
D) 2.715 .