Question

Steel Factory Workers AgesMean: 42 Median: 38 Range: 52 Mean Deviation: 11.23Shift 118255642293854473530Shift 223195049673430594033Shift 319222440452933293959Shift 421232540351970402223 The summary statistics for all of the workers at a steel factory are shown. Four sample groups were taken from each of the four shifts. For which sample group is the mean closest to the population mean?
a.Shift 1B)Shift 2C)Shift 3D)Shift 4

Answer 1

C)Shift 3
Adding all shifts together and dividing by 10 (there are 10 per sample) will give you the closest to the population which was a mean of 40.6 for shift 3.