23) The records of 100 postal employees who volunteered for a study, showed that the average time these employees had worked for the postal service was x = standard deviation of the population of time postal service employees have spent with the postal service is approximately 8 years. Assume that we know that the normal with standard deviation o 5 years. A 95% confidence interval for the mean time u the population of postal service employees have spent with the postal service is:
23) The records of 100 postal employees who volunteered for a study, showed that the average time these employees had worked for the postal service was x = standard deviation of the population of time postal service employees have spent with the postal service is approximately 8 years. Assume that we know that the normal with standard deviation o 5 years. A 95% confidence interval for the mean time u the population of postal service employees have spent with the postal service is:
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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![23) The records of 100 postal employees who volunteered for a study,
showed that the average time these employees had worked for the
postal service was x =
standard deviation of the population of time postal service
employees have spent with the postal service is approximately
8 years. Assume that we know that the
normal with standard deviation o
5
years. A 95% confidence
interval for the mean time u the population of postal service
employees have spent with the postal service is:](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa9fe904f-47e6-4a20-8b43-7f9bd9a80b06%2Fe452a58d-a45c-4b5e-998b-406776d5518e%2Fnjes91m_processed.jpeg&w=3840&q=75)
Transcribed Image Text:23) The records of 100 postal employees who volunteered for a study,
showed that the average time these employees had worked for the
postal service was x =
standard deviation of the population of time postal service
employees have spent with the postal service is approximately
8 years. Assume that we know that the
normal with standard deviation o
5
years. A 95% confidence
interval for the mean time u the population of postal service
employees have spent with the postal service is:
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