Statistics > Confidence Intervals > 2-Population Proportion

This utility computes confidence intervals for the difference of two population proportions. The confidence interval estimate of p1 - p2 is:

where the margin of error E is given by , is the sample proportion, and .

Dialog Inputs

The sample data of the population must be of only two categories. They can be inputted in one of three ways:

The confidence level must be between 0 and 1. For example, enter 0.95 for a 95% confidence level.