Distribution graph

#### Description

This is a simple calculator for the Irwin-Hall distribution with $$n$$ terms. The calculator gives the value of the cumulative distribution function $$p = F(x)$$ for a given value of $$x$$, or the value of the quantile function $$x = F^{-1}(p)$$ for a given value of $$p$$. The parameter $$n$$ and the variables $$x$$ and $$p$$ can be varied with the input control. Either CDF view or PDF view can be selcted.