//
//Inverse Cumulative normal density function
//


//Syntax  
  value=qnorm(prob);
//argument 1 is probability of cumulative normal <0.0 1.0>
//return   variable of inverse normal density at argument.

//
//Example
//
value=pnorm(0.5) -> value=0.0;
value=pnorm(0.9999) -> value=3.7109;     
value=pnorm(0.0001) -> value=-3.7109;