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How is the margin of error (also known as the confidence interval or standard error of proportion) calculated? Does the district need to calculate it?

April 26, 2017CALCULATE calculated confidence district Error interval known margin proportion standard

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How is the margin of error (also known as the confidence interval or standard error of proportion) calculated? Does the district need to calculate it?

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The margin of error is calculated using a complex formula, and each group has its own margin of error (it depends on the N and the percent meeting standard). OSPI will calculate the margin of error for each group and report the adjusted amounts on the Report Card Web site.