A microwave oven repairer says that the mean repair cost for damaged microwave ovens is less than $100. You work for the repairer and want to test the claim. You find that a random sample of 5 microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. You want to test the claim at a alpha level of .01. Choose the result that provides the result of this claim a. Accept Ho (the claim that repair cost is less than or equal to $100), since t calculated of 4.472 is greater than critical t of 3.747 b. Reject Ho (the claim that repair cost is less than or equal to $100) since t calculated of -4.472 is less than a critical t value of -3.747 c. Accept Ho (the claim that repair cost is less than or equal to $100) since t calculated of -4.472 is less than a critical t value of 3.747 d. Reject Ho (the claim that repair cost is less than or equal to $100) since t calculated of 2.132 is less than a critical t of 3.747