Question

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. the valve was tested on 180 engines and the mean pressure was 5.5 pounds/square inch. assume the standard deviation is known to be 1.0. is there evidence at the 0.02 level that the valve performs above the specifications? step 1 of 5: enter the hypotheses: answer 1 point $h_0$: $h_a$:

Explanation:

Step1: Define null hypothesis

The null hypothesis $H_0$ is that the valve performs at or below the specifications. So, $H_0:\mu\leq5.3$.

Step2: Define alternative hypothesis

The alternative hypothesis $H_a$ is that the valve performs above the specifications. So, $H_a:\mu > 5.3$.

Answer:

$H_0:\mu\leq5.3$
$H_a:\mu > 5.3$