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

The standard error of the mean is computed by: s/sqrtn

Where:

S is the standard deviation

N is the sample size

So in our problem, standard deviation is 14 while the sample mean is 49.

Using the formula given above and plugging in the given:

Standard error = s / sqrt n

= 14 / sqrt 49

= 14 / 7

= 2