Review 5 Question 7 An engineer designed a valve that will r

Review 5 Question 7 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 5.0 lbs/square inch. It is believed that the valve performs above the specifications. The valve was tested on 140 engines and the mean pressure was 5.1 lbs/square inch. Assume the standard deviation is known to be 0.8. A level of significance of 0.05 will be used. Determine the decision rule. DECISION RULE Enter the decision rule. Reject H0 if z > . (Round your answer to 2 decimal places.) Review 5 Question 7

Solution

1.96