Compute the quantile function for the normal distribution.
Compute the quantile function for the normal distribution. For small to moderate probabilities, algorithm referenced below is used to obtain an initial approximation which is polished with a final Newton step. For very large arguments, an algorithm of Wichura is used. Used by ShapiroWilk Test Ported by Javascript implementation found at https://raw.github.com/rniwa/js-shapiro-wilk/master/shapiro-wilk.js Originally ported from http://svn.r-project.org/R/trunk/src/nmath/qnorm.c
Used internally by ShapiroWilkW().
Used internally by ShapiroWilkW()