An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 180 engines and the mean pressure was 5.2 pounds/square inch (psi). Assume the population standard deviation is 0.6. The engineer designed the valve such that it would produce a mean pressure of 5.3 psi. It is believed that the valve does not perform to the specifications. A level of significance of 0.02 will be used. Find the value of the test statistic. Round your answer to two decimal places.
An engineer has designed a valve that will regulate water pressure on an automobile engine. The...
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 180 engines and the mean pressure was 6.2 pounds/square inch (psi). Assume the population standard deviation is 0.8. The engineer designed the valve such that it would produce a mean pressure of 6.3 psi. It is believed that the valve does not perform to the specifications. A level of significance of 0.01 will be used. Find the value of the...
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 4.5 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 200 engines and the mean pressure was 4.6 pounds/square inch. Assume the standard deviation is known to be 0.6. A level of significance of 0.02 will be used. Find the value of the test...
an engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 290 engines and the mean pressure 4.1 pounds/square inch (psi). Assume the population standard deviation is 0.6. If the valve was designed to produce a mean pressure of 4.2 psi, is there sufficient evidence at the 0.02 level that the valve does not perform to the specifications? FIND THE VALUE OF THE TEST STATISTIC AND IS THIS TWO TAILED OR...
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 120 engines and the mean pressure was 6.2 pounds/square inch (psi). Assume the population standard deviation is 0.8. The engineer designed the valve such that it would produce a mean pressure of 6.3 psi. It is believed that the valve does not perform to the specifications. A level of significance of 0.01 will be used. Find the value of the...
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 6.5 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 180 engines and the mean pressure was 6.7 pounds/square inch. Assume the standard deviation is known to be 1.0 . A level of significance of 0.05 will be used. Find the value of the...
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 4.7 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 160 engines and the mean pressure was 4.8 pounds/square inch. Assume the standard deviation is known to be 0.6. A level of significance of 0.05 will be used. State the hypotheses. H0: Ha:
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 5.3 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 12 engines and the mean pressure was 5.7 pounds/square inch with a standard deviation of 0.9. A level of significance of 0.1 will be used. Assume the population distribution is approximately normal. Determine the...
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 5.9 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 160 engines and the mean pressure was 6.0 pounds/square inch. Assume the variance is known to be 0.36. A level of significance of 0.05 will be used. Determine the decision rule.
An engineer has 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 6.4 pounds/square inch. The valve was tested on 24 engines and the mean pressure was 6.6 pounds/square inch with a standard deviation of 0.7. Is there evidence at the 0.05 level that the valve does not perform to the specifications? Assume the population distribution is approximately normal. Step 1 of 5:...
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 4.8 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 240 engines and the mean pressure was 4.9 pounds/square inch. Assume the variance is known to be 1.00. A level of significance of 0.05 will be used. Make a decision to reject or fail...