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(See Steps) The manufacturer of a sports car claims that the fuel injection system lasts 48 months before it needs to be replaced. A consumer group tests

Question: The manufacturer of a sports car claims that the fuel injection system lasts 48 months before it needs to be replaced. A consumer group tests this claim by surveying a random sample of 10 owners who had the fuel injection system replaced. The ages of the cars at the time of replacement were (in months):

29
42
49
48
53
46
30
51
42
52
  1. Use your calculator to verify that the mean age of a car when the fuel injection system fails is \(\bar{x}=44.2\) months, with standard deviation \(s=8.61\) months.
  2. Test the claim that the fuel injection system lasts less than an average of 48 months before needing replacement. Use a \(5 \%\) level of significance.

Price: $2.99
Solution: The downloadable solution consists of 2 pages
Deliverable: Word Document


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