An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 250 engines and the mean pressure wa Ibs/square inch. Assume the variance is known to be 0.36. If the valve was designed to produce a mean pressure of 5.8 lbs/square inch, is there sufficient ev the 0.02 level that the valve performs above the specifications? State the null and alternative hypotheses for the above scenario. O Tables Answer Keybo. Ho: Ha

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