An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 210 engines
and the mean pressure was 4.7 pounds/square inch (psi). Assume the population standard deviation is 1.0. The engineer designed the valve such that it would produce a mean pressure of 4.8 psi. It is believed that the valve does not perform to the specifications. A level of significance of 0.05 will be used. Find the value of the test statistic. Round your answer to two decimal places.
1 answer:
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Answer:
(a) 11 people
(b) 24 people
Step-by-step explanation:
Part (a)
Let X be the people who are network friends with three other people in the network.
The total pairings = 50
Since ∈
,
Solve for X to find the people who are network friends with three other people,
Answer: There are 11 people who are network friends with three other people in the network.
Part (b)
Total people in the network,
Answer: There are a total of 24 people in the network.