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ht bulb manufacturer wants to compare the mean lifetimes of two of its light bulbs, model A and model B. Independent random samples of the two models taken. Analysis of 11 bulbs of model A showed a mean lifetime of 1323 hours and a standard deviation of 95 hours. Analysis of 13 bulbs of model B ed a mean lifetime of 1366 hours and a standard deviation of 98 hours. Assume that the populations of lifetimes for each model are normally distributed that the variances of these populations are equal. Construct a 95% confidence interval for the difference H₁-H₂ between the mean lifetime ₁ of model A s and the mean lifetime ₂ of model B bulbs. Then find the lower limit and upper limit of the 95% confidence interval. y your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list of ulas.) Lower limit: Upper limit: Explanation Check X

ht bulb manufacturer wants to compare the mean lifetimes of two of its light bulbs, model A and model B. Independent random samples of the two models taken. Analysis of 11 bulbs of model A showed a mean lifetime of 1323 hours and a standard deviation of 95 hours. Analysis of 13 bulbs of model B ed a mean lifetime of 1366 hours and a standard deviation of 98 hours. Assume that the populations of lifetimes for each model are normally distributed that the variances of these populations are equal. Construct a 95% confidence interval for the difference H₁-H₂ between the mean lifetime ₁ of model A s and the mean lifetime ₂ of model B bulbs. Then find the lower limit and upper limit of the 95% confidence interval. y your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list of ulas.) Lower limit: Upper limit: Explanation Check X

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 light bulb manufacturer wants to compare the mean lifetimes of two of its light bulbs, model A and model B. Independent random samples of the two models were taken. Analysis of 11 bulbs of model A showed a mean lifetime of 1323 hours and a standard deviation of 95 hours. Analysis of 13 bulbs of model B showed a mean lifetime of 1366 hours and a standard deviation of 98 hours. Assume that the populations of lifetimes for each model are normally distributed and that the variances of these populations are equal. Construct a 95% confidence interval for the difference H₁ H₂ between the mean lifetime ₁ of model A bulbs and the mean lifetime ₂ of model B bulbs. Then find the lower limit and upper limit of the 95% confidence interval. Carry your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: Upper limit: Explanation Check X S M 31 Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center A
Transcribed Image Text:A light bulb manufacturer wants to compare the mean lifetimes of two of its light bulbs, model A and model B. Independent random samples of the two models were taken. Analysis of 11 bulbs of model A showed a mean lifetime of 1323 hours and a standard deviation of 95 hours. Analysis of 13 bulbs of model B showed a mean lifetime of 1366 hours and a standard deviation of 98 hours. Assume that the populations of lifetimes for each model are normally distributed and that the variances of these populations are equal. Construct a 95% confidence interval for the difference H₁ H₂ between the mean lifetime ₁ of model A bulbs and the mean lifetime ₂ of model B bulbs. Then find the lower limit and upper limit of the 95% confidence interval. Carry your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: Upper limit: Explanation Check X S M 31 Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center A
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