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How to find the alternate hypotheses and critical value?

A truck dealer titles that a new model will give trouble free service for at least 15,000 miles - Data below shows a sample of the of miles of trouble free service for the dealer's pickups that were sold a couple of years ago. Test the dealer's claim at a 2.5% level of significance.

16,000
15,000
14,350
14,500
13,750
13,000
14,250
13,900

1) What is the alternative hypothesis
2) What is the test statistic
3) What is the critical value?
4) Does the evidence support the claim?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923486

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