Estimating the standard error

The most important parameter of the distribution of p2 − p1 is its standard deviation. This is also the standard deviation of the estimation error when p2 − p1 is used to estimate π2 − π1 — the standard error of the estimate.

Confidence interval for difference

A 95% confidence interval for π2 − π1 can be found from the standard error of p2p1.

Examples

95% confidence intervals are now found for a few examples.