Design of Experiments Guide > Sample Size Explorers > Confidence Interval Calculators
Publication date: 05/24/2021

Confidence Interval Calculators

Use the confidence interval calculators to select a study sample size to obtain an interval estimate with pre-specified characteristics. Explore the impact of sample size on the margin of error of an interval estimate. Explore sample size for a confidence, prediction, or tolerance interval for one mean. Explore sample size for a confidence interval for two means, or one or two proportions or variances.

For interval estimation, select DOE > Sample Size Explorers > Confidence Intervals:

Margin of Error for One Sample Mean

Margin of Error for One Sample Proportion

Margin of Error for One Sample Variance

Margin of Error for Two Independent Sample Means

Margin of Error for Two Independent Sample Proportions

Margin of Error for Two Independent Sample Variances

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