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how to find sample size given margin of error. Get the population standard deviation s and sample size n. The s is the standard deviation.
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To find the right z-score to use refer to the table below. Access via the w. Multiply the result by the z-score consistent with your desired confidence interval according to the following table.
E margin of error.
N zcsE 2. Access via the w. Sample Size N 1 Ne 2 N population size. N zcsE 2.
