How To Find Sample Size From Margin Of Error Complete Guide

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how to find sample size from margin of error. N population size e Margin of error percentage in decimal form z z-score. Take the square root of the calculated.

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The E is the desired margin of error. N zcsE2. You should only use this if circumstances prevent you from determining an appropriate standard of deviation andor confidence level thereby preventing you from determining your z-score as well.

In this formula z is the z value obtained from the Z distribution table.

The z-score is the number of standard deviations a given proportion is away from the mean. MOE 0977 31623 100 3089. S is the population standard deviation of the data set. Sample Size N 1 Ne 2 N population size.