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

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An engineer has 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 7.57.5 pounds/square inch. The valve was tested
on 99 engines and the mean pressure
was 7.37.3 pounds/square inch with a variance
of 0.640.64. Is there evidence at the 0.10.1 level
that the valve does not perform to the specifications? Assume the
population distribution is approximately normal.
Step 2 of 5:
Find the value of the test statistic. Round your answer to three
decimal places.