PROBLEM An engineer designed a valve that will regulate water pressure on an aut
ID: 3311408 • Letter: P
Question
PROBLEM 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 7.9 lbs/square inch. It is believed that the valve performs above the specifications. The valve was tested on 26 engines and the mean pressure was 8.2 lbs/square inch with a standard deviation of 0.6. A level of significance of 0.1 will be used. Determine the decision rule. Assume the population distribution is approximately normal. DECISION RULE Determine the decision rule. Reject H, if t (Round your answer to 3 decimal places.) KEYPAD 35 mins Test StatusExplanation / Answer
In statistics, the t-statistic is the ratio of the departure of the estimated value of a parameter from its hypothesized value to its standard error. ... For example, it is used in estimating the population mean from a sampling distribution of sample means if the population standard deviation is unknown.
Reject if t > 1.316
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