Two companies manufacture a rubber material in-tended for use in an automotive application. The part will besubjected to abrasive wear in the field application, so we decideto compare the material produced by each company in a test.Twenty-five samples of material from each company are testedin an abrasion test, and the amount of wear after 1000 cycles isobserved. For company 1, the sample mean and standard de-viation of wear are = 20 milligrams/1000 cycles ands = 2 milligrams/1000 cycles, while for company 2 we obtain= 15 milligrams/1000 cycles and s, = 8 milligrams/1000cycles.Find a 95% confidence interval on the difference in mean wear µ, - Hz.Assume each population is normally distributed but that theirvariances are not equal.What is the lower bound? Three decimal places

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Answered: Two companies manufacture a rubber…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 2AGP

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