An engineer has designed a valve that will regulate water pressure on an automobile engine. the valve was tested on 130 engines and the mean pressure was 7.6 lbs/square inch. assume the standard deviation is known to be 1. if the valve was designed to produce a mean pressure of 7.7lbs/square inch, is there sufficient evidence at the 0.05 level that the valve does not perform to the specifications?

state the null and alternative hypotheses for the above scenario.

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )

probability for j is 1/4

while

a is 1/6

step-by-step explanation:

when the line is solid:

when the line is dashed:

this > inequality sign means:

this < inequality sign means:

this > inequality sign means:

this < inequality sign means:

about the problem:

srry i'm not done ! i'll