Question: Consumer Reports indicated that the mean acceleration time (0 to 60 mph) for a certain car was 10.2 seconds. In most tests of this type,

Consumer Reports indicated that the mean acceleration time (0 to 60 mph) for a certain car was 10.2 seconds. In most tests of this type, regular gasoline is used. Suppose that 40 such tests were made using premium gasoline and that sample mean acceleration time was 9.8 seconds with a sample standard deviation, s, of 2.1 seconds. Does this indicate that premium gasoline reduces acceleration time, on average? Use a a = 0.01. Write out all 6 steps of a hypothesis test as shown on page 2 of the Section 9.2 through 9.6 Guided Notes. 1.) State HO and HI using symbols (also define the unknown parameter of interest first). 2.) State the level of significance. 3.) Compute the test statistic (write out the formula that's used to compute it and write out the calculator program that you used). 4.) Compute the P-value. 5.) Make a decision. Write the conclusion (in the context of the problem)
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