PPT-Hw 2

Author : briana-ranney | Published Date : 2017-03-18

Prob 1 Two new methods for producing a tire have been proposed To ascertain which is superior a tire manufacturer produces a sample of 10 tires using the first method

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Hw 2: Transcript

Prob 1 Two new methods for producing a tire have been proposed To ascertain which is superior a tire manufacturer produces a sample of 10 tires using the first method and a sample of 8 using the second The first set are to be road tested at location A and the second at location B It is known from past experience that the lifetime of a tire that is road tested at one of these locations is normally distributed with a mean life due to the tire but with a variance due for the most part to the location Specifically it is known that the lifetimes of tires tested at location A are normal with standard deviation equal t0 4000 kilometers whereas those tested at location B are normal with σ 6000 kilometers If the manufacturer is interested in testing the hypothesis that there are no appreciable difference in the mean life of tires produced by either method what conclusion should be drawn at the 5 level of significance if the resulting data are as given in the table below.

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