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9.14 THE BANK CUSTOMER WAITING TIME CASE Recall that a bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes. Suppose the manager wishes to use the random sample of 100 waiting times to support the claim that the mean waiting time under the new system is shorter than six minutes. a Letting u represent the mean waiting time under the new system, set up the null and alternative hypotheses needed if we wish to attempt to provide evidence supporting the claim that u is shorter than six minutes. b The random sample of 100 waiting times yields a sample mean of = 5.46 minutes. Assum- ing that o = 2.47 minutes, use critical values to test H, versus H, at each of a = .10, .05, .01, and .001.

9.14 THE BANK CUSTOMER WAITING TIME CASE Recall that a bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes. Suppose the manager wishes to use the random sample of 100 waiting times to support the claim that the mean waiting time under the new system is shorter than six minutes. a Letting u represent the mean waiting time under the new system, set up the null and alternative hypotheses needed if we wish to attempt to provide evidence supporting the claim that u is shorter than six minutes. b The random sample of 100 waiting times yields a sample mean of = 5.46 minutes. Assum- ing that o = 2.47 minutes, use critical values to test H, versus H, at each of a = .10, .05, .01, and .001.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Lesson: Hypothesis Testing

Exercise #1 9.14 THE BANK CUSTOMER WAITING TIME CASE Recall that a bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes. Suppose the manager wishes to use the random sample of 100 waiting times to support the claim that the mean waiting time under the new system is shorter than six minutes. a Letting u represent the mean waiting time under the new system, set up the null and alternative hypotheses needed if we wish to attempt to provide evidence supporting the claim that u is shorter than six minutes. b The random sample of 100 waiting times yields a sample mean of = 5.46 minutes. Assum- ing that o = 2.47 minutes, use critical values to test H, versus H, at each of a = .10, .05, .01, and .001.
Transcribed Image Text:Exercise #1 9.14 THE BANK CUSTOMER WAITING TIME CASE Recall that a bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes. Suppose the manager wishes to use the random sample of 100 waiting times to support the claim that the mean waiting time under the new system is shorter than six minutes. a Letting u represent the mean waiting time under the new system, set up the null and alternative hypotheses needed if we wish to attempt to provide evidence supporting the claim that u is shorter than six minutes. b The random sample of 100 waiting times yields a sample mean of = 5.46 minutes. Assum- ing that o = 2.47 minutes, use critical values to test H, versus H, at each of a = .10, .05, .01, and .001.
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