Function quantileNormal

docs/app/js/sanddance-app.js:119338–119341

(p, mean, stdev)

    return z > 0 ? 1 - cd : cd;
} // Approximation of Probit function using inverse error function.
function quantileNormal(p, mean, stdev) {
    if (p < 0 || p > 1) return NaN;
    return (mean || 0) + (stdev == null ? 1 : stdev) * SQRT2 * erfinv(2 * p - 1);
} // Approximate inverse error function. Implementation from "Approximating
// the erfinv function" by Mike Giles, GPU Computing Gems, volume 2, 2010.
// Ported from Apache Commons Math, http://www.apache.org/licenses/LICENSE-2.0
function erfinv(x) {