customers at its branches is 4.87 minutes with s.d. 1.10 minutes. An independent random sample of 100 Bank B customers yields an average waiting time of 4.50 minutes with s.d. 1.21 minutes. Perform a hypothesis test to determine whether these sampling results provide significant evidence that the overall average waiting time of Bank A’s customers is longer than that of Bank B’s customers. (a) Clearly state the test hypotheses. Begin with “Let ….. represent ….., respectively.” (b) Use an appropriate formula to calculate the test statistic. (c) Use an appropriate
The average waiting time of 64 r/s Bank A’s customers at its branches is 4.87 minutes with s.d.
1.10 minutes. An independent random sample of 100 Bank B customers yields an average waiting
time of 4.50 minutes with s.d. 1.21 minutes. Perform a hypothesis test to determine whether these
sampling results provide significant evidence that the overall average waiting time of Bank A’s
customers is longer than that of Bank B’s customers.
(a) Clearly state the test hypotheses. Begin with “Let ….. represent …..,
respectively.”
(b) Use an appropriate formula to calculate the test statistic.
(c) Use an appropriate table to estimate the p-value.
(d) Use the p-value to draw and explain your conclusion of the test
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Use the p-value to draw and explain your conclusion of the test
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