From a population of 200 elements a sample of 49 elements is

From a population of 200 elements, a sample of 49 elements is selected. It is determined that the sample mean is 56 and the sample standard deviation is 14. The standard error of the mean is

a. 3

b. 2

c. greater than 2

d. less than 2

Solution

b.2

standard error of the mean is ratio of sd/sqrt(n)

sd =14 and n=49;

14/sqrt(49) = 14/7 = 2