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Suppose it is known from experience that the standard deviation of the weight of 10-ounce packages of cookies is 2.5 ounces. To check whether or not the true average is, on a given day, 10 ounces, employees selected a random sample from the packages. For the significance level a = 0.05, when the average is 12.5 ounces, the power of the test is 0.90. What is the sample size for this study?

Suppose it is known from experience that the standard deviation of the weight of 10-ounce packages of cookies is 2.5 ounces. To check whether or not the true average is, on a given day, 10 ounces, employees selected a random sample from the packages. For the significance level a = 0.05, when the average is 12.5 ounces, the power of the test is 0.90. What is the sample size for this study?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Suppose it is known from experience that the standard deviation of the weight of 10-ounce packages of cookies is 2.5 ounces. To check whether or not the true average is, on a given day, 10 ounces, employees selected a random sample from the packages. For the significance level a = 0.05, when the average is 12.5 ounces, the power of the test is 0.90. What is the sample size for this study?
Transcribed Image Text:Suppose it is known from experience that the standard deviation of the weight of 10-ounce packages of cookies is 2.5 ounces. To check whether or not the true average is, on a given day, 10 ounces, employees selected a random sample from the packages. For the significance level a = 0.05, when the average is 12.5 ounces, the power of the test is 0.90. What is the sample size for this study?
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