Correct Incorrect An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such that it would produce a mean pressure of 4.2 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 240 engines and the mean pressure was 4.3 pounds/square inch. Assume the variance is known to be 0.64. A level of significance of 0.02 will be used. Determine the decision rule. Enter the decision rule. Answer Tables Keypad How to enter your answer (opens in new window) Keyboard Shortcuts Reject Ho if z >