Customer satisfaction. An automobile manufacturer would like to know whatproportion of
Chapter 0, Problem 20.38(choose chapter or problem)
Customer satisfaction. An automobile manufacturer would like to know whatproportion of its customers are not satisfied with the service provided by the localdealer. The customer relations department will survey a random sample ofcustomers and compute a 99% confidence interval for the proportion who are notsatisfied.(a) Past studies suggest that this proportion will be about 0.2. Find the samplesize needed if the margin of error of the confidence interval is to be about 0.015.(b) When the sample is actually contacted, 10% of the sample say they are notsatisfied. What is the margin of error of the 99% confidence interval?
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