A study plans to sample randomly 100 government records of farms to estimate the mean acreage of
Question:
A study plans to sample randomly 100 government records of farms to estimate the mean acreage of farms in Place A. Results from an earlier study suggest that 400 acres is a reasonable guess for the population standard deviation of farm size.
(a) Approximate the probability that the sample mean acreage falls within 20 acres of the population mean acreage.
(b) If in reality the population standard deviation is larger than 400, would the probability be larger, or smaller, than you found in (a)?
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Related Book For 
Statistical Methods For The Social Sciences
ISBN: 9781292220314
5th Global Edition
Authors: Alan Agresti
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