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Original Articles

New approximation of the normal distribution function

Pages 173-176 | Published online: 27 Jun 2007
 

Abstract

Two new and simple expressions, one for 0 ≤ x ≤ 2 and another for x > 2, for the normal distribution function, are developed which can be easily computed on desk calculators. They are also comparable in accuracy to the one developed by Patry and Keller (1964).

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