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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.

(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.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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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
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
(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?
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