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What sample size is needed to give the desired margin of error in estimating a population proportion with the indicated level of confidence? Consider a margin of error within ±2% with 95% confidence
What sample size is needed to give the desired margin of error
in estimating a population proportion with the indicated level of confidence? Consider a margin of error within ±2% with 95% confidence. An initial small sample finds p (hat) =0.78. Assume this is a reasonable estimate of the population proportion.
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