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A state agriculture department wants to estimate the mean number of acres on farms in the state. An earlier study had a standard deviation of 210.
A state agriculture department wants to estimate the mean number of acres on farms in the state. An earlier study had a standard deviation of 210.(a) How many farms should they put in their sample if they plan to use a 95% confidence interval, and they want their estimate to be within 33 acres of the true mean number of acres?n = (whole number)(b) How many farms should they put in their sample if they plan to use a 95% confidence interval, and they want their estimate to be within 20 acres of the true mean number of acres?n = (whole number)(c) How many farms should they put in their sample if they plan to use a 99% confidence interval, and they want their estimate to be within 33 acres of the true mean number of acres.?n = (whole number)
