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 x̅=8 years. Assume that we know that the standard deviation of the population of time postal service employees have spent with the postal service is approximately normal with a standard deviation of σ=5 years. A 95% confidence interval for the meantime μ the population of postal service employees have spent with the postal service is?
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 x̅=8 years. Assume that we know that the standard deviation of the population of time postal service employees have spent with the postal service is approximately normal with a standard deviation of σ=5 years. A 95% confidence interval for the meantime μ 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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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 x̅=8 years. Assume that we know that the standard deviation of the population of time postal service employees have spent with the postal service is approximately normal with a standard deviation of σ=5 years. A 95% confidence interval for the meantime μ the population of postal service employees have spent with the postal service is?
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