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Unformatted text preview: water pressure on an automobile engine. The engineer designed the valve such that it would produce a mean pressure of 5.5 lbs/square inch. It is believed that the valve performs above the specification. The valve was tested on 290 engines and the mean pressure was 5.6 lbs/square inch. Assume the standard deviation is known to be 1 lb/inch. Make the decision to reject or to fail to reject the null hypothesis....
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- Spring '08
- Standard Deviation, Null hypothesis, Statistical hypothesis testing, Internal combustion engine