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A computer information systems manager is debating which of two similarly priced laptop battery packs to purchase. He is interested in determining whether there is a difference in the average time the battery packs function before needing to be recharged. Based on two independent random samples, the following summary information was computed: Model 1 Model 2 Sample size Sample mean 15 16 6.2 hours 6.5 hours Sample standard deviation 1.8 hours 2.6 hours

A computer information systems manager is debating which of two similarly priced laptop battery packs to purchase. He is interested in determining whether there is a difference in the average time the battery packs function before needing to be recharged. Based on two independent random samples, the following summary information was computed: Model 1 Model 2 Sample size Sample mean 15 16 6.2 hours 6.5 hours Sample standard deviation 1.8 hours 2.6 hours

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
Section10.4: Distributions Of Data
Problem 19PFA
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A computer information systems manager is debating which of two similarly priced laptop battery packs to purchase. He is interested in determining whether there is a difference in the average time the battery packs function before needing to be recharged. Based on two independent random samples, the following summary information was computed: Model 1 Model 2 Sample size Sample mean 15 16 6.2 hours 6.5 hours Sample standard deviation 1.8 hours 2.6 hours
Transcribed Image Text:A computer information systems manager is debating which of two similarly priced laptop battery packs to purchase. He is interested in determining whether there is a difference in the average time the battery packs function before needing to be recharged. Based on two independent random samples, the following summary information was computed: Model 1 Model 2 Sample size Sample mean 15 16 6.2 hours 6.5 hours Sample standard deviation 1.8 hours 2.6 hours
Assuming normal populations with equal variances, calculate a 99% confidence interval for the difference in the average functioning time of the two models.
Transcribed Image Text:Assuming normal populations with equal variances, calculate a 99% confidence interval for the difference in the average functioning time of the two models.
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