One Sample Score Test of a Proportion

Where $g$ is the observed proportion, $e$ is the expected proportion, $n$ is the effective sample size, and $d_{eff}$ is Extra deff:

$z=\frac{g-e}{\sqrt{d_{eff}e(1-e)/n}}$

where $p\approx 2(1-\mathrm{\Phi }(|z|))$ if $|g-e|\ge 0.0001$ and NaN otherwise.