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At the 5% level of significance, does it appear that the variance of method 1 is significantly larger than the variance of method 2?

At the 5% level of significance, does it appear that the variance of method 1 is significantly larger than the variance of method 2?

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
Problem 1P
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Two methods of filling cereal boxes are being compared. Both methods fill the box with the same amount of cereal on average so the company wants to select the method with the lower variance. In a sample of 31 boxes filled using method 1, the standard deviation of fill weights is .75 ounces and in a sample of 41 boxes filled using method 2, the standard deviation is .65 ounces. At the 5% level of significance, does it appear that the variance of method 1 is significantly larger than the variance of method 2?
3) Two methods of filling cereal boxes are being compared. Both methods fill the box with the same amount of cereal on average so the company wants to select the method with the lower variance. In a sample of 31 boxes filled using method 1, the standard deviation of fill weights is .75 ounces and in a sample of 41 boxes filled using method 2, the standard deviation is .65 ounces. At the 5% level of significance, does it appear that the variance of method 1 is significantly larger than the variance of method 2?
Transcribed Image Text:3) Two methods of filling cereal boxes are being compared. Both methods fill the box with the same amount of cereal on average so the company wants to select the method with the lower variance. In a sample of 31 boxes filled using method 1, the standard deviation of fill weights is .75 ounces and in a sample of 41 boxes filled using method 2, the standard deviation is .65 ounces. At the 5% level of significance, does it appear that the variance of method 1 is significantly larger than the variance of method 2?
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