-
$$ H_{1} : p_{1} > p_{2} \rightarrow z_{0} > z_{\alpha} $$
$$ H_{1} : p_{1} < p_{2} \rightarrow z_{0} < - z_{\alpha} $$
$$ H_{1} : p_{1} \neq p_{2} \rightarrow | \ z_{0} \ | > z_{\alpha/2} $$
단, $\hat{p}$는 아래와 같다.
$$\hat{p} = \frac{X + Y}{n_{1} + n_{2}}$$