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Data: An automotive shop believes annual cost of automotive maintenance is over $3500. A random sample...

Data: An automotive shop believes annual cost of automotive maintenance is over $3500. A random sample of 8 cars has a sample mean of $3625 and a sample standard deviation of $225. At a 0.05 level of significance, do you have enough evidence to support the shop’s claim?

Determine the type of test:

Determine the rejection region:

Find the standardized test statistic

Decide whether to reject or fail to reject the null hypothesis and interpret the decision.

(a) Fail to Reject Ho: Not enough evidence to reject claim.

(b) Reject Ho: Not enough evidence to support claim

(c) Reject Ho: Enough evidence to support claim

(d) Reject Ho. Enough evidence to reject claim.

(e) Fail to Reject Ho: Not enough evidence to support claim

Math   Statistics-And-Probability   
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