Question: The following data set represents the repair costs (in dollars) for a random

sample of 30 dishwashers.

41 90 100 118 52 90 101 119 57 91

103 120 68 91 104 140 73 93 105 141

78 95 111 147 88 88 95 96 117 118

a. (4) Find the point estimate of the population mean.

b. (4) Find the maximum error of estimate for a 95% level of confidence.

c. (4) Construct a 95 % confidence interval for the population mean and interpret the results.