QUESTION 14 20 points Save Answer 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 4.6 pounds/square inch. The valve was tested on 240 engines and the mean pressure was 4.7 pounds/square inch. Assume the standard deviation is known to be 0.9. Perform a hypothesis test with a condence level of 90% to determine if the valve performs above specications. State the hypotheses (here are some needed symbols: p 2 s y = a 6 02) H0: Ha: The critical value is