wo companies manufacture a rubber material intended for use in an automotive application. The part will be subjected to abrasiv vear in the field application, so we decide to compare the material produced by each company in a test. Twenty-five samples of naterial from each company are tested in an abrasion test, and the amount of wear after 1000 cycles is observed. For company 1, he sample mean and standard deviation of wear are 71= 22 milligrams/1000 cycles and s1 = 2 milligrams/1000 cycles, while for ompany 2 they are 72 = 12 milligrams/1000 cycles and s2 = 8 milligrams/1000 cycles. Use a = 0.05 and assume each population ormally distributed but that their variances are not equal. a) Test the hypothesis Ho : µ1 = H2 vs H1 : µ1 H2. Calculate to = i Round your answer to two decimal places (e.g. 98.76). b) Do the data support the claim that the two companies produce material with different mean wear? c) Do the data support a claim that the material from company 1 has higher mean wear than the material from company 2?
wo companies manufacture a rubber material intended for use in an automotive application. The part will be subjected to abrasiv vear in the field application, so we decide to compare the material produced by each company in a test. Twenty-five samples of naterial from each company are tested in an abrasion test, and the amount of wear after 1000 cycles is observed. For company 1, he sample mean and standard deviation of wear are 71= 22 milligrams/1000 cycles and s1 = 2 milligrams/1000 cycles, while for ompany 2 they are 72 = 12 milligrams/1000 cycles and s2 = 8 milligrams/1000 cycles. Use a = 0.05 and assume each population ormally distributed but that their variances are not equal. a) Test the hypothesis Ho : µ1 = H2 vs H1 : µ1 H2. Calculate to = i Round your answer to two decimal places (e.g. 98.76). b) Do the data support the claim that the two companies produce material with different mean wear? c) Do the data support a claim that the material from company 1 has higher mean wear than the material from company 2?
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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