Binomial cumulative distribution function
For \(X\sim B(n,p)\),
\[P(X\le x)=P(0\le X\le x)=\sum_{k=0}^{x}\binom nkp^k(1-p)^{n-k}\]
Before using BinomCDF on a TI-84 series graphic calculator, convert the expression to the form \(P(X\le x)\). For integers \(a,b\) between \(0\) and \(n\) inclusive, use the following identities.
| 1. \(P(X\le n)=1\) | 2. \(P(X<a)=P(X\le a-1)\) |
| 3. \(P(X>a)=1-P(X\le a)\) | 4. \(P(X\ge a)=1-P(X\le a-1)\) |
| 5. \(P(a\le X\le b)=P(X\le b)-P(X\le a-1)\) | 6. \(P(a<X<b)=P(X\le b-1)-P(X\le a)\) |
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