Question

question 9 of 13 step 5 of 6 01:48:35 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 5.4 pounds/square inch (psi). assume the population standard deviation is 0.9. if the valve was designed to produce a mean pressure of 5.2 psi, is there sufficient evidence at the 0.05 level that the valve performs above the specifications? step 5 of 6: identify the level of significance for the hypothesis test. answerhow to enter your answer (opens in new window) 1 point tables keypad keyboard shortcuts

Explanation:

Step1: Recall significance level definition

The level of significance is given in the problem - statement.

Step2: Identify the value

The problem states "at the 0.05 level", so the level of significance $\alpha = 0.05$.

Answer:

$0.05$