# Negative binomial distribution (chart) Calculator

## 負の二項分布の確率密度、下側累積確率、上側累積確率のグラフを表示します。

 確率密度 f 下側累積確率 P 上側累積確率 Q

 k=1,2,...
１試行の成功確率 p
 0≦p≦1
[ x の初期値
 k回成功までの失敗数

 繰返回数 ]
 $\normal Negative\ Binomial\ distribution\\[10](1)\ probability\ mass\\\hspace{30}f(x,k,p)={}_{x+k-1}C_xp^k(1-p)^x\\(2)\ lower\ cumulative\ distribution\\\hspace{30}P(x,k,p)={\large\sum_{t=0}^{x}}f(t,k,p)\\(3)\ upper\ cumulative\ distribution\\\hspace{30}Q(x,k,p)={\large\sum_{t=x}^{n}}f(t,k,p)\\$

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