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keisanHigh-precision calculations for everyday life and work

Normal Distribution (Percentile)

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Calculate the percentile based on the lower or upper cumulative probability value of the normal distribution.
Cumulative Mode
Cumulative Probability
0≦P,Q≦1
Mean μ
Standard deviation σ
σ>0
The default values for μ and σ correspond to the standard normal distribution.

\(\normalsize Normal\ distribution\ N(x,\mu,\sigma)\\ (1) probability\ density\\ \hspace{30px}f(x,\mu,\sigma)={\large\frac{1}{\sqrt{2\pi}\sigma}e^{-\frac{1}{2}\left(\frac{x-\mu}{\sigma}\right)^2}}\\ (2) lower\ cumulative\ distribution\\ \hspace{30px}P(x,\mu,\sigma)={\large\int_{\small-\infty}^{\small x}}f(t,\mu,\sigma)dt\\ (3) upper\ cumulative\ distribution\\ \hspace{30px}Q(x,\mu,\sigma)={\large\int_{\small x}^{\small\infty}}f(t,\mu,\sigma)dt\\ \)

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