An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 210 engines
and the mean pressure was 4.7 pounds/square inch (psi). Assume the population standard deviation is 1.0. The engineer designed the valve such that it would produce a mean pressure of 4.8 psi. It is believed that the valve does not perform to the specifications. A level of significance of 0.05 will be used. Find the value of the test statistic. Round your answer to two decimal places.
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Answer:
Step-by-step explanation:
The formula of a volume of a pyramid:
<em>B</em><em> - area of a base</em>
<em>H</em><em> - height</em>
We have
Substitute: