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 44 49 48 53 46 30 51 42 52  (a) What is the level of significance?   (b)What is the value of the sample test statistic? (Round your answer to three decimal places.)

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 44 49 48 53 46 30 51 42 52
 
(a) What is the level of significance?
 
(b)What is the value of the sample test statistic? (Round your answer to three decimal places.)
 

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