DDonuts claims that the waiting time of customers for service is normally distributed with a mean of three minutes and a standard deviation of one minute. The quality assurance department found in a sample of 50 customers that the mean waiting time is 2.85 minutes. At a 0.05 level of significance, can we conclude that the mean waiting time is less than three minutes? 1. 2. 3. 4. 5. Problem Definition of u Null hypothesis, Ho Alternative hypothesis, Ha Level of significance Test statistics Critical region, Critical value & Decision rule 6. Computed value 7. Decision 8. Conclusion HO:μ = 3 Ha: μ<3 Level of significance = 0.05
DDonuts claims that the waiting time of customers for service is normally distributed with a mean of three minutes and a standard deviation of one minute. The quality assurance department found in a sample of 50 customers that the mean waiting time is 2.85 minutes. At a 0.05 level of significance, can we conclude that the mean waiting time is less than three minutes? 1. 2. 3. 4. 5. Problem Definition of u Null hypothesis, Ho Alternative hypothesis, Ha Level of significance Test statistics Critical region, Critical value & Decision rule 6. Computed value 7. Decision 8. Conclusion HO:μ = 3 Ha: μ<3 Level of significance = 0.05
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 25SGR
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Perform a statistical analysis/test of hypothesis, showing all the steps in hypothesis testing.
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