Calculate mean = Σx/n
93% = mean ± 1.81 SEm
SEm = SD/√n
The data below are the ages of a random sample of 8 men in a bar. It is known that the population of ages are normally distributed with a standard deviation of 11. Determine the 93% confidence interval estimate of the population mean.
50 70 22 36 59 39 27 47
1 answer
1 answer