Refer to Exercise 8. a. Find a 98% lower confidence bound for the mean efficiency. b. The
Question:
Refer to Exercise 8.
a. Find a 98\% lower confidence bound for the mean efficiency.
b. The claim is made that the mean efficiency is greater than \(84.6 \%\). With what level of confidence can this statement be made?
Data From Exercise 8:
In a sample of 60 electric motors, the average efficiency (in percent) was 85 . Assume the population standard deviation is 2 .
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