To compare the battery life of Duracell versus Energizer batteries, a sample of 140 Duracell batteries lasted an average of 345 minutes with a standard deviation of 95 minutes and a sample of 125 Energizer batteries lasted an average of 280 minutes with a standard deviation of 86 minutes. a) At the 1% level of significance, test the hypothesis that Duracell batteries last at least 45 minutes longer on average than Energizer batteries? b) What is the p-value?
To compare the battery life of Duracell versus Energizer batteries, a sample of 140 Duracell batteries lasted an average of 345 minutes with a standard deviation of 95 minutes and a sample of 125 Energizer batteries lasted an average of 280 minutes with a standard deviation of 86 minutes. a) At the 1% level of significance, test the hypothesis that Duracell batteries last at least 45 minutes longer on average than Energizer batteries? b) What is the p-value?
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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To compare the battery life of Duracell versus Energizer batteries, a sample of 140 Duracell batteries lasted an average of 345 minutes with a standard deviation of 95 minutes and a sample of 125 Energizer batteries lasted an average of 280 minutes with a standard deviation of 86 minutes.
a) At the 1% level of significance, test the hypothesis that Duracell batteries last at least 45 minutes longer on average than Energizer batteries?
b) What is the p-value?
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