Next THREE questions (9-11) are related

The X Tech Company is considering a new computer-assisted program to train maintenance employees to do machine repairs.A random sample of6 employees were selected to complete the training program.The data on the training time in days are shown below.

x

33

32

46

42

44

37

9) The variance of the sample is

a 24.2 b 26.8 c 34.4 d 35.6

10) The margin of error for a 95 percent confidence interval for the population mean training days is:

a 4.6 b 5.2 c 6.2 d 7.2

11) To build a 95% confidence interval for the mean training days with a margin of error of 2 days, what is the minimum sample size. Use a planning value of = 6 days.

a 35 b 39 c 44 d 48