Confidence Interval for p1-p2

Confidence Interval for p₁-p₂

$\begin{displaymath}\hat{p}_{1} - \hat{p}_{2} \pm z^{*}\sqrt{\frac{\hat{p}_{1}(1 ... ...t{p}_{1})}{n_{1}} + \frac{\hat{p}_{2}(1 - \hat{p}_{2})}{n_{2}}}\end{displaymath}$

$\begin{displaymath}\textrm{where} \ \hat{p}_{1} = \frac{x_{1}}{n_{1}} \ \textrm{and} \ \hat{p}_{2} = \frac{x_{2}}{n_{2}}\end{displaymath}$

Jonathan Payne
1999-04-08