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3.26. Three brands of batteries are under study. It is suspect- ed that the lives (in weeks) of the three brands are different. Five randomly selected batteries of each brand are tested with the following results: Brand 1 100 96 92 96 92 Weeks of Life Brand 2 76 80 75 84 82 Brand 3 108 100 96 98 100

3.26. Three brands of batteries are under study. It is suspect- ed that the lives (in weeks) of the three brands are different. Five randomly selected batteries of each brand are tested with the following results: Brand 1 100 96 92 96 92 Weeks of Life Brand 2 76 80 75 84 82 Brand 3 108 100 96 98 100

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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(a) Are the lives of these brands of batteries different? (b) Analyze the residuals from this experiment. (c) Construct a 95 percent confidence interval estimate on the mean life of battery brand 2. Construct a 99 per- cent confidence interval estimate on the mean differ- ence between the lives of battery brands 2 and 3. (d) Which brand would you select for use? If the manu- facturer will replace without charge any battery that fails in less than 85 weeks, what percentage would the company expect to replace?
Transcribed Image Text:(a) Are the lives of these brands of batteries different? (b) Analyze the residuals from this experiment. (c) Construct a 95 percent confidence interval estimate on the mean life of battery brand 2. Construct a 99 per- cent confidence interval estimate on the mean differ- ence between the lives of battery brands 2 and 3. (d) Which brand would you select for use? If the manu- facturer will replace without charge any battery that fails in less than 85 weeks, what percentage would the company expect to replace?
3.26. Three brands of batteries are under study. It is suspect- ed that the lives (in weeks) of the three brands are different. Five randomly selected batteries of each brand are tested with the following results: Brand 1 100 96 92 96 92 Weeks of Life Brand 2 76 80 75 84 82 Brand 3 108 100 96 98 100
Transcribed Image Text:3.26. Three brands of batteries are under study. It is suspect- ed that the lives (in weeks) of the three brands are different. Five randomly selected batteries of each brand are tested with the following results: Brand 1 100 96 92 96 92 Weeks of Life Brand 2 76 80 75 84 82 Brand 3 108 100 96 98 100
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