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 7.0 pounds/square inch. The valve was tested on 170 engines and the mean pressure was 7.1 pounds/square inch. Assume the standard deviation is known to be 0.9. Is there evidence at the 0.1 level that the valve performs above the specifications? Step 1 of 5: Enter the hypotheses: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 7.0 pounds/square inch. The valve was tested on 170 engines and the mean pressure was 7.1 pounds/square inch. Assume the standard deviation is known to be 0.9. Is there evidence at the 0.1 level that the valve performs above the specifications? Step 2 of 5: Enter the value of the z test statistic. Round your answer to two decimal places.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 7.0 pounds/square inch. The valve was tested on 170 engines and the mean pressure was 7.1 pounds/square inch. Assume the standard deviation is known to be 0.9. Is there evidence at the 0.1 level that the valve performs above the specifications? Step 3 of 5: Specify if the test is one-tailed or two-tailed.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 7.0 pounds/square inch. The valve was tested on 170 engines and the mean pressure was 7.1 pounds/square inch. Assume the standard deviation is known to be 0.9. Is there evidence at the 0.1 level that the valve performs above the specifications? Step 4 of 5: Enter the decision rule.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 7.0 pounds/square inch. The valve was tested on 170 engines and the mean pressure was 7.1 pounds/square inch. Assume the standard deviation is known to be 0.9. Is there evidence at the 0.1 level that the valve performs above the specifications? Step 5 of 5: Enter the conclusion.