Question

5. A computer repairer believes that the mean repair cost for damaged computers is more than $95. To test this claim, you determine the repair cost for 12 randomly selected computers and find that the mean repair cost is $100, with a standard deviation of $12.50. At a= 0.05 do you have enough evidence to support the repairer’s claim?

             1. State the null and alternative hypotheses.

           2. Verify that the conditions are met

            3. What is the P-value?    

            4. What is the Test Statistic?

            5. State the conclusion in context

Answer 1

Let denotes the mean repair cost for damaged computers.

There is not sufficient evidence to support the repairer’s claim that the mean repair cost for damaged computers is more than $95.