Question

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 110engines and the mean pressure was 4.6 pounds/square inch (psi). Assume the population standard deviation is 0.8 If the valve was designed to produce a mean pressure of 4.5psi, is there sufficient evidence at the 0.02 level that the valve does not perform to 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 110 engines and the mean pressure was 4.6pounds/square inch (psi). Assume the population standard deviation is 0.8If the valve was designed to produce a mean pressure of 4.5 psi, is there sufficient evidence at the 0.02 level that the valve does not perform to the specifications?

Step 4 of 6:

Find the P-value of the test statistic. Round your answer to four decimal places.

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 110 engines and the mean pressure was 4.6 pounds/square inch (psi). Assume the population standard deviation is 0.8. If the valve was designed to produce a mean pressure of 4.5psi, is there sufficient evidence at the 0.02level that the valve does not perform to the specifications?

Step 5 of 6:

Identify the level of significance for the hypothesis test.v

Answer 1