Chapter 9 Qui. X WA Chapter 9 Qui X WA Chapter 9 Hor X Cengage Digit X VA appendixil-tat x VA 'appendixii-to X VA a-table-03-all x VA a-table-04-alt x VA a-table-03-all x + - C https://www.webassign.net/web/Student/Assignment-Responses/last?dep=27770339#question4656170_4 r best submission for each question part is used for your score. [-/1 Points] DETAILS BBBASICSTAT8 9.R.014.S. MY NOTES ASK YOUR TEACHER 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): 27 44 47 48 53 46 30 51 42 52 In USE SALT (1) Use your calculator to calculate the mean age of a car when the fuel injection system fails x and standard deviation s. (Round your answers to four decimal places.) X = 44 months S = 8.8944 months (11) 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. What are we testing in this problem? O single proportion single mean