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An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer...

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Statistics

An engineer designed a valve that will regulate water pressureon an automobile engine. The engineer designed the valve such thatit would produce a mean pressure of 4.3 pounds/square inch. It isbelieved that the valve performs above the specifications. Thevalve was tested on 19 engines and the mean pressure was 4.5pounds/square inch with a standard deviation of 0.8. A level ofsignificance of 0.01 will be used. Assume the populationdistribution is approximately normal. Determine the decision rulefor rejecting the null hypothesis. Round your answer to threedecimal places.

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