A sigmoid approximation of the standard normal integral

Gary R. Waissi, Donald F. Rossin

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


This paper presents a simple sigmoid function for approximation of cumulative standard normal probabilities. The approximation has an error of ±0.000043 for -8 ≤ Z ≤ 8.

Original languageEnglish (US)
Pages (from-to)91-95
Number of pages5
JournalApplied Mathematics and Computation
Issue number1
StatePublished - Jan 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Computational Mathematics
  • Applied Mathematics


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