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Set up curve (draw tail(s) and label rejection region with the appropriate value):

Set up curve (draw tail(s) and label rejection region with the appropriate value):

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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Please complete part c of this question

An engineer measured the Brinell hardness of 25 pieces of randomly chosen ductile iron that were subcritically annealed. The engineer claimed that the mean Brinell hardness of all such ductile iron pieces is greater than 170. She finds that the mean hardness for the sample of 25 was 172.52 with a standard deviation of 10.31. a) Write out the null and alternative hypothesis: b) What sort of test is appropriate to test the claim? t-test for mean, µ z-test for mean, µ z-test for proportion, p Set up curve (draw tail(s) and label rejection region with the appropriate value):
Transcribed Image Text:An engineer measured the Brinell hardness of 25 pieces of randomly chosen ductile iron that were subcritically annealed. The engineer claimed that the mean Brinell hardness of all such ductile iron pieces is greater than 170. She finds that the mean hardness for the sample of 25 was 172.52 with a standard deviation of 10.31. a) Write out the null and alternative hypothesis: b) What sort of test is appropriate to test the claim? t-test for mean, µ z-test for mean, µ z-test for proportion, p Set up curve (draw tail(s) and label rejection region with the appropriate value):
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