The Philadelphia office of Arthur Andersen, Inc. hired five accounting trainees this year. Their monthly starting salaries were: $2, 536, $2, 173, $2, 448, $2, 121, and $2, 622,
1. Compute the population mean.
2. Compute the population standard deviation.
3. The Pittsburgh office hired 6 trainees. Their mean monthly salary was $2, 550, and the standard deviation was $250. Compare the two groups.