Find the minimum sample size to find the 90% interval estimate for a population proportion if you want to be accurate to 4%
Find the minimum sample size to find the 90% interval estimate for a population proportion if you want to be accurate to 4%.
Solution: First, we have the 90% confidence Margin of Error is given by
We want the estimate for a population proportion to be accurate within 4%, which is equivalent to have
The sample size should be at least 601.
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