"The following frequency distribution table shows staffing levels (number ofofficers reporting) forthe 50 mostrecent shifts at Metropolitan Police Headquarters:

Staff Level (Number of Officers) x Number of Shifts f(x)

40 13

41 7

42 5

43 5

44 7

45 13

Total 50

b. Compute themean, the varianceand the standarddeviation for the staffing data.

c. Identify the median and the mode."