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how small can a sample be in a plus four confidence interval?

how small can a sample be in a plus four confidence interval?

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Use the Plus Four Confidence interval method when Confidence interval is more than 90% and sample size is at least 10. If population proportion being so small or so large, the sample proportion is also get nearby to 0 or nearby to 1 then this method should be used. Plus Four Confidence interval method corrects for a larger margin of error, this margin must still be factored in to provide the most perfect statistical observation.From this method we get more accurately inferential statistics.

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