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