WaitTime 1.6 6.6 5.6 5.1 3.9 4.6 6.5 6.4 8.6 4.2 5.8 3.4 9.3 7.4 1.8 6.2 5.4 4.9

Question

WaitTime 1.6 6.6 5.6 5.1 3.9 4.6 6.5 6.4 8.6 4.2 5.8 3.4 9.3 7.4 1.8 6.2 5.4 4.9 5.4 0.8 2.5 8.3 6.1 6.3 6.8 9.8 2.9 10.9 4.7 3.9 3.2 6.5 2.3 8.7 4.7 3.6 2.7 3.7 0.4 10.2 2.8 11.6 4.3 3.1 5.8 5.6 4.4 4.5 6.7 8.1 4.3 2.2 5.8 8.6 2.0 8.0 9.5 1.3 4.8 9.9 7.9 1.1 7.2 2.9 9.1 7.7 4.0 1.4 7.8 5.2 8.4 6.3 4.4 5.2 7.4 6.1 3.8 10.7 7.5 7.0 5.3 4.5 4.5 1.8 3.7 4.0 5.7 2.4 9.2 5.0 7.2 7.3 4.1 6.7 3.5 6.3 4.3 3.8 5.1 5.5 THE BANK CUSTOMER WAITING TIME CASE Recall that Table 1.9 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 outputs of statistics describing the 100 waiting times. (a) Find the sample mean on the outputs. (Round your answer to 2 decimal places.) Mean __________ Does the sample mean provide some evidence that the mean of the population of all possible customer waiting times during peak business hours is less than six minutes (as is desired by the bank manager)?, because __________ (b) Find the sample median on the outputs. How do the mean and median compare? What does the histogram in Figure 2.16 tell you about why they compare this way? (Round your answer to 2 decimal places.) Median ___________ The mean is the median. The histogram is .

Explanation / Answer

mean of the given data is

5.46

median is 5.25

using minitab

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