Using the sample standard deviation of age as an estimate of the population standard deviation, calculate by hand the standard error of the mean. Show your calculations and the answer.

Using the sample standard deviation of age as an estimate of the population standard deviation, calculate by hand the standard error of the mean. Show your calculations and the answer.

Standard error = standard deviation / (√sample size) = 11.9 / √30 = 2.1726

Standard error = 2.17

The hand calculated figure for standard error of age matches the figures presented in the Excel output of the descriptive statistics for age (see Table 2).