A business wants to know the estimate of the proportion of tractors that are over the age of 20 and still in every day u
Posted: Tue Jul 05, 2022 9:19 am
A business wants to know the estimate of the proportion oftractors that are over the age of 20 and still in every day use.Assume that a preliminary study has shown that 85% of tractors overthe age of 20 are still in use. How large should the sample size beso that a 99% confidence interval for the population proportion hasa margin of error of 0.05?
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