This applet performs inference for the difference between two population proportions, $p_1-p_2$.

Directions

• For the first sample, enter the sample size in the $n_1$ box and enter the sample proportion in the $\hat{p}_1$ box.
• Enter the summary statistics, $n_2$ and $\hat{p}_2$, for the second sample.
• Hitting "Tab" or "Enter" on your keyboard will compute a 95% confidence interval for $p_1-p_2$.

To perform a hypothesis test, enter $H_0$ and $H_a$. The critical value, test statistic, and $p$-value are computed and graphed.