formula for finding sample size given margin of error . If youd like to see how we perform the calculation view the page source. N 1962 05 1 - 05 0052.
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PSolutionSince the confidence interval is 210 6-464. HOW TO FIND a Critical Value using the z-table. The sample population p is 540 1000 054.
N population size e Margin of error percentage in decimal form z z-score.
The n is the smallest sample size that will give us this error using this CI. Popular Course in this category. The sample population p is 540 1000 054. To find the right z-score to use refer to the table below.
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N 09604 00025 38416.
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Sqrt N - nx nN-1 where N is the population size r is the fraction of responses that you are interested in and Z c 100 is the critical value for the confidence level c.
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N zcsE2.
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To do this use the confidence interval equation above but set the term to the right of the sign equal to the margin of error and solve for the resulting equation for sample size n.
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Sqrt N - nx nN-1 where N is the population size r is the fraction of responses that you are interested in and Z c 100 is the critical value for the confidence level c.
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The margin of Error Formula The formula for the margin of error is calculated by multiplying a critical factor for a certain confidence level with the population standard deviation and then the result is divided by the square root of the number of observations in the sample.