Question

A simple random sample of 64 observations was taken from a large population. The sample mean and the standard deviation were determined to be 70 and 12 respectively. The standard error of the mean is . . . (hint: enter the answer with one decimal place)

Answer 1

Standard deviation, $\sigma$ = 12

Sample size, n = 64

Standard error $\sigma _{\bar{x}}$ , = $\sigma/\sqrt{n}$

= $12/\sqrt{64}$

= 1.5