February 24, 2017

Homework Help: Behavioral Statistics

Posted by Jen on Monday, February 10, 2014 at 9:23pm.

I need someone to explain HOW to do this..I don't want just the answer I have got to figure out how to do this before my mid-term, and I'm completely clueless!

3. One of the major U.S. tire makers wishes to review its warranty for their rainmaker tire. The warranty is for 40,000 miles. The tire company believes that the tire actually lasts more than 40,000 miles. A sample 49 tires revealed that the mean number of miles is 45,000 miles with a standard deviation of 15,000 miles. Test the hypothesis with a 0.05 significance level.

Answer these questions:

3a) What is the H0? Null hypothesis, hypothesis about a population of the relationship among populations
3b) What is the H1? alternative hypothesis, hypothesis about parameters that is accepted if the null hypothesis is rejected
3c) What is the decision rule?
3d) What is the calculated value of z?
3e) What is your decision?

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