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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 5.7 pounds/square inch. It isbelieved that the valve performs above the specifications. Thevalve was tested on 12 engines and the mean pressure was 5.9pounds/square inch with a variance of 0.81 . A level ofsignificance of 0.1 will be used. Assume the populationdistribution is approximately normal. Determine the decision rulefor rejecting the null hypothesis. Round your answer to threedecimal places.

reject Ho if T> ?

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