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