An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 140 engines an pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 1.0. If the valve was designed to produce a m of 5.6 psi, is there sufficient evidence at the 0.01 level that the valve performs below the specifications? Step 3 of 6: Specify if the test is one-tailed or two-tailed.

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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 140 engines and the mean
pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 1.0. If the valve was designed to produce a mean pressure
of 5.6 psi, is there sufficient evidence at the 0.01 level that the valve performs below the specifications?
Step 3 of 6: Specify if the test is one-tailed or two-tailed.
Transcribed Image Text:An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 140 engines and the mean pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 1.0. If the valve was designed to produce a mean pressure of 5.6 psi, is there sufficient evidence at the 0.01 level that the valve performs below the specifications? Step 3 of 6: Specify if the test is one-tailed or two-tailed.
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 140 engines and the mean
pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 1.0. If the valve was designed to produce a mean pressure
of 5.6 psi, is there sufficient evidence at the 0.01 level that the valve performs below the specifications?
Step 4 of 6: Find the P-value of the test statistic. Round your answer to four decimal places.
Transcribed Image Text:An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 140 engines and the mean pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 1.0. If the valve was designed to produce a mean pressure of 5.6 psi, is there sufficient evidence at the 0.01 level that the valve performs below the specifications? Step 4 of 6: Find the P-value of the test statistic. Round your answer to four decimal places.
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