A technician compares repair costs for two types of microwave ovens (type | and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type II ovens. A sample of 60 type I ovens has a mean repair cost of $85.79. The population standard deviation for the repair of type I ovens is known to be $15.13. A sample of 56 type II ovens has a mean repair cost of $78.67. The population standard deviation for the repair of type II ovens is known to be $17.84. Conduct a hypothesis test of the technician's claim at the 0.1 level of significance. Let u be the true mean repair cost for type I ovens and /2 be the true mean repair cost for type II ovens. Step 2 of 5 : Compute the value of the test statistic. Round your answer to two decimal places. Answer Tables Keypad How to enter your answer (opens in new window) Keyboard Shortcuts Previous Step Answers