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 4.4 pounds/5quare inch (psi). Assume the population standard deviation is 0.8. If the valve was designed to produce a mean pressure of 4.2 psi, is there sufficient evidence at the 0.05 level that the valve performs above the specifications? Step 1 of 6 : State the null and alternative hypotheses. An enginecr has designed a valve that will regulate water pressure on an automoblie engine. Tho valve was tested on 110 engines and the mean pressure was 4.4 poundsisquare inch (p5i). Assume the population standard dewation is 0.8. If the valve was designed to produce a mean pressure of 4.2 psi, is there sufficient eyldence at the 0.05 level that the valve performs above the specifications? Step 2 of 6: Find the value of the test statistic. Round your answer to two decimal places An engincer has designed a valve that will regulate water pressure on an automobie enginei The value was tested on 110 engines and the mean pressure was 4.4 pounds/square inch (psi), Rssume the population standard deviation is 0.8. If the valve was designed to produce a mean pressure of 4.2p i, is there sufficlent evidence ar the 0 .05 level that the valve periorms above the specifications? Step 3 of 6 : 5 pecify if the test is one-talled or two-tailed. An engineer has designed a vilve that will regulate water pressure on an automobile engine. The valve was tested on 110 engines and the mean pressure was 4.4 pounds/square inch (psi). Assume the population standard devlation is 0.8. If the valve was designed to produce a mean pressure of 4.2 psi, is there sutricient evidence at the 0.05 level that the yalve performs above the specifications? Step 4 of 6: Find the Pyalue of the test statistic Round your answer to four decimal paces. An engineer has designed a valve that will regulate water pressure on an automobile-engine. The yalve was tested on 110 engines and the mean pressure was 4.4 pounds/square inch (pso) Assume the population standard devation is 0.8. If the valve was designed to produce a mean pressure of 4.2 psi, is there sufficient evidence at the 0.05 fevel that the valve performs above the specifieations? Step 5 of 6 : identify the level of significance for the hypothesis test. 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 4.4 pounds/square inch (psi). Assume the population standard deviation is 0.8. If the valve was designed to produce a mean pressure of 4.2psi, is there sufficient evidence at the 0.05 level that the valve performs above the specifications? Step 6 of 6 : Make the decision to reject or fail to reject the null hypothesis
