If you want to be 99 confident of estimating the population


Question: 1. If you want to be 99% confident of estimating the population proportion to within an error of ±0.04, what sample size is needed?

2. If you want to be 95% confident of estimating the population proportion to within an error of ±0.02 and there is historical evidence that the population proportion is approximately ±0.40, what sample size is needed?

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Basic Statistics: If you want to be 99 confident of estimating the population
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