An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 220 engines and the mean pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 0.6. If the valve was designed to produce a mean pressure of 5.5 psi, is there sufficient evidence at the 0.05 level that the valve does not perform to the specifications? Step 5 of 6 : Identify the level of significance for the hypothesis test.

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rileymiller201763 rileymiller201763

14-06-2022
Mathematics

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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 220 engines and the mean pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 0.6. If the valve was designed to produce a mean pressure of 5.5 psi, is there sufficient evidence at the 0.05 level that the valve does not perform to the specifications? Step 5 of 6 : Identify the level of significance for the hypothesis test.

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okpalawalter8 okpalawalter8 · Answer 1 · 2022-06-15T19:02:18+02:00

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 220 engines and the mean pressure was 5.4 pounds/square inch (psi), the level of significance for the hypothesis test is 0.05. This is further explained below.

What is the level of significance?

Generally, the level of significance is simply defined as statistical analysis, the significance level is defined as the likelihood of rejecting the null hypothesis when it is correct.

In conclusion, The average pressure throughout testing on 220 engines was 5.4 psi, and the significance threshold for the hypothesis test was set at 0.05.