Mathematics, 26.11.2019 19:31 janiadavis35

An engineer has designed a valve that will regulate water pressure on an automobile engine. the valve was tested on 130 engines and the mean pressure was 7.6 lbs/square inch. assume the standard deviation is known to be 1. if the valve was designed to produce a mean pressure of 7.7lbs/square inch, is there sufficient evidence at the 0.05 level that the valve does not perform to the specifications?

state the null and alternative hypotheses for the above scenario.

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

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