Mathematics, 19.09.2019 03:00 michellebreshears451
An engineer 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 5.85.8 pounds/square inch. it is believed that the valve performs above the specifications. the valve was tested on 290290 engines and the mean pressure was 5.95.9 pounds/square inch. assume the variance is known to be 0.640.64. a level of significance of 0.010.01 will be used. make a decision to reject or fail to reject the null hypothesis.
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