Independent Samples Z-Test - Comparing Two Proportions (Pooled)

From Q
Jump to: navigation, search

Where g_1 and g_2 are the two proportions and n_1 and n_2 are the sample sizes:

z=\frac{g_1-g_2}{\sqrt{d_{eff} \times g_{12}(1-g_{12})(n^{-1}_1+n^{-1}_2)}}

where:

g_{12}=\frac{n_1 g_1 + n_2 g_2}{n_1+n_2} , and
p = 2(1-\Phi(|z|)).