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

Where ${\displaystyle g_{1}}$ and ${\displaystyle g_{2}}$ are the two proportions and ${\displaystyle n_{1}}$ and ${\displaystyle n_{2}}$ are the sample sizes:
${\displaystyle z={\frac {g_{1}-g_{2}}{\sqrt {d_{eff}\times g_{12}(1-g_{12})(n_{1}^{-1}+n_{2}^{-1})}}}}$
${\displaystyle g_{12}={\frac {n_{1}g_{1}+n_{2}g_{2}}{n_{1}+n_{2}}}}$, and
${\displaystyle p=2(1-\Phi (|z|))}$.