# Question

The mean and the standard deviation of the sample of 100 bank customer waiting times are and =5.46 and s = 2.475.

a. What does the histogram in Figure 2.16 say about whether the Empirical Rule should be used to describe the bank customer waiting times?

b. Use the Empirical Rule to calculate estimates of tolerance intervals containing 68.26 percent, 95.44 percent, and 99.73 percent of all possible bank customer waiting times.

c. Does the estimate of a tolerance interval containing 68.26 percent of all waiting times provide evidence that at least two- thirds of all customers will have to wait less than eight minutes for service? Explain your answer.

a. What does the histogram in Figure 2.16 say about whether the Empirical Rule should be used to describe the bank customer waiting times?

b. Use the Empirical Rule to calculate estimates of tolerance intervals containing 68.26 percent, 95.44 percent, and 99.73 percent of all possible bank customer waiting times.

c. Does the estimate of a tolerance interval containing 68.26 percent of all waiting times provide evidence that at least two- thirds of all customers will have to wait less than eight minutes for service? Explain your answer.

## Answer to relevant Questions

The mean and the standard deviation of the sample of 65 customer satisfaction ratings are =5.46 and s= 2.475 a. What does the histogram in Figure 2.16 say about whether the Empirical Rule should be used to describe the bank ...Calculate the mean, median, and mode of each of the following populations of numbers: a. 9, 8, 10, 10, 12, 6, 11, 10, 12, 8 b. 110, 120, 70, 90, 90, 100, 80, 130, 140 Below we give the average hourly outdoor temperature (x) in a city during a week and the city’s natural gas consumption (y) during the week for each of eight weeks (the temperature readings are expressed in degrees ...Recall that Table 1.7 presents the satisfaction ratings for the XYZ- Box game system that have been given by 65 randomly selected purchasers. Figures 3.8 and 3.11(a) give the MINITAB and Excel outputs of statistics ...Recall that Table 1.8 presents the waiting times for teller service during peak business hours of 100 randomly selected bank customers. Figures 3.9 and 3.11(b) give the MINITAB and Excel out-puts of statistics describing the ...Post your question

0