What is the margin of error for the population mean at 90% confidence level for the information in DATA.

a) 0.75

b) 0.74

c) 0.73

d) 0.72

e) None of the answers match my calculations

Hint: Accuracy is required because three of the answers are close. It is suggested that you compute using Excel, use cell addresses instead of typing intermediate results, and only round the final result using the Number options in the Home tab.

Wait Time (minutes) 2.1 8.0 4.6 2.5 3.5 4.3 3.9 5.0 6.5 3.4 5.6 6.6 4.3 4.9 9.3 5.5 4.3 11.9 5.2 4.8 5.2 7.8 8.0 4.6 4.0 5.9 8.7 3.1 4.9 11.6