The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can

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The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 96600 km. The population standard deviation of the mileage is 8050 km. The Crosset Truck Company bought 48 tires and found that the mean mileage for its trucks is 95 795 km. Is Crosset’s experience different from that claimed by the manufacturer at the 0.05 level of significance.

(a) State the null hypothesis and the alternative hypothesis. 

(b) State the decision rule. 

(c) Compute the value of the test statistic. 

(d) What is your decision regarding H0?

(e) What is the p-value? Interpret it.

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Related Book For  book-img-for-question

Basic Statistics For Business & Economics

ISBN: 9781259268939

6th Canadian Edition

Authors: Douglas A. Lind, William G Marchal, Samuel A. Wathen, Carol Ann Waite

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