Independent Samples T-Test - Comparing Two Proportions

Where $g_{1}$ and $g_{2}$ are the two proportions and $n_{1}$ and $n_{2}$ are the sample sizes:

$z = \frac{g_{1} - g_{2}}{\sqrt{g_{12} (1 - g_{12}) (n_{1}^{- 1} + n_{2}^{- 1})}}$

where:

g_{12} = \frac{n_{1} g_{1} + n_{2} g_{2}}{n_{1} + n_{2}}

where $p \approx 2 \Pr (t_{n_{1} + n_{2} - 2} \geq | t |)$ .

Navigation menu