Two hundred tires of each of four brands are individually placed in a testing apparatus and run
Question:
Two hundred tires of each of four brands are individually placed in a testing apparatus and run until failure. The results are obtained the results shown in the following table:
(a) Use the 0.01 level of significance to test the null hypothesis that there is no difference in the qual-ity of the four kinds of tires with regard to their durability.
(b) Plot the four individual \(99 \%\) confidence intervals for proportions that last more than 40,000 miles.
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Related Book For
Probability And Statistics For Engineers
ISBN: 9780134435688
9th Global Edition
Authors: Richard Johnson, Irwin Miller, John Freund
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