Answer Happy

According to a leasing firm’s reports, the mean number of miles driven annually in its leased cars is 12,940 miles with a standard deviation of 2920 miles. The company recently starting using new contracts which require customers to have the cars serviced at their own expense. The company’s owner believes the mean number of miles driven annually under new contracts, µ h, is less than 12,940 miles. He takes a random sample of 50 cars under the new contracts. The cars in the sample had a mean of 12,340 miles annual miles driven. Is there support for the claim, at the 0.05 level of significance, that the population mean number of miles driven annually by cars under the new contracts, is less than 12,940 miles?
Assume that the population standard deviation of miles driven annually was not affected by the change to the contracts.
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places, and round your responses as specified below.
State the null hypothesis H₀ and the alternative hypothesis H₁.
H₀ :
H₁ : degrees of freedom:
Determine the type of test statistic to use. (choose one)
Z/t/Chi-square/F
Find the value of the test statisti (Round to three or more decimal places)
Find the p-value. (Round to three or more decimal places)
Can we support the claim that the population mean number of miles driven annually by cars under the new contracts is less than 12,940? (choose one)
Yes or No