Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
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Category > Management Posted 04 Mar 2018 My Price 5.00

tire manufacturer

A tire manufacturer will adopt a new tire design unless there is evidence that the standard deviation of tread life span of the new tires is more than 2.5 thousand miles.

(a) Specify the null and alternative hypotheses.

(b) Use t=read.table(”TireLifeTimes.txt”, header=T); var(t$x) to compute the sample variance of the tread life spans of a sample of 20 new tires. Test the hypotheses specified in part (a) at level α = 0.025. On the basis of this test, will the new design be adopted?

(c) Construct a normal Q-Q plot and comment on any concerns that ought to be raised regarding the procedure used to decide on the adoption of the new tire design.

Answers

Maurice Tutor
(5)
Status NEW Posted 04 Mar 2018 06:03 PM My Price 5.00

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