To determine the efficiency of a batch of production of electric motors, 8 motors are tested. the average efficiency of the sample is calculated to be 88.5% and the standard deviation of the sample is 0.5 percentage point. (a) determine a 95% confidence interval for the mean efficiency of the (b) if we want to cut the confidence interval to one third, how many more motors should be tested?

explanation:

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answer:

science is the study of the nature and behavior of natural things and the knowledge that we obtain about them. a science is a particular branch of science such as physics, chemistry, or biology. physics is the best example of a science which has developed strong, abstract theories.

pseudoscience is a collection of beliefs or practices mistakenly regarded as being based on scientific method.

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answer:

put more,