node-ztable

A simple module to convert z-scores to percentiles using the standard normal table. If a z-score is higher than 3.49 or lower than -3.49, it will return 1 or 0 respectively. Example usage:

var ztable = require('ztable');

var zscore = -1.3452;

console.log(ztable(zscore));
// => 0.0901