An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 1701

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answerhappygod
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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 1701

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An engineer has designed a valve that will regulate waterpressure on an automobile engine. The valve was tested on 170170engines and the mean pressure was 6.56.5 lbs/square inch. Assumethe standard deviation is known to be 11. If the valve was designedto produce a mean pressure of 6.66.6 lbs/square inch, is theresufficient evidence at the 0.050.05 level that the valve performsbelow the specifications?
State the null and alternative hypotheses for the abovescenario.
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