OFFSET
0,1
COMMENTS
0.75 percentile of the normal probability distribution function. In a bilateral sense, normally distributed random values x are equally likely to fall inside the interval (-a*sigma, +a*sigma) as to fall outside, "a" being this constant. - Stanislav Sykora, Nov 08 2013
LINKS
Stanislav Sykora, Table of n, a(n) for n = 0..9999
Stanislav Sykora, PARI/GP scripts for NormalErrorFunctions.
Eric Weisstein's World of Mathematics, Standard Normal Distribution
Eric Weisstein's World of Mathematics, Probable Error
EXAMPLE
InverseErf(1/2) * sqrt(2) = 0.674489750...
MATHEMATICA
RealDigits[ Sqrt[2] InverseErf[1/2], 10, 111][[1]] (* Robert G. Wilson v, Feb 11 2015 *)
PROG
(PARI) See the links.
(PARI) solve(x=0, 1, erfc(x)-1/2)*sqrt(2) \\ Charles R Greathouse IV, Oct 15 2015
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Mar 03 2004
STATUS
approved