Some improvements for existing simple Approximations of the Normal Distribution Function

Due to the widespread applicability and use of normal distribution, a need has arisen approximate its cumulative distribution function (cdf). In this article, five new simple approximations standard cdf are developed. order assess accuracy proposed approximations, both maximum absolute error mean were used. The errors lie between 0.00095 0.00946, which is highly accurate if compared existing quite sufficient for many real-life applications. Even though may not as complicated ones, they are, though, fairly good when judged vis-a-vis their simplicity.