Timeline for Derivation of cumulative Binomial Distribution expression
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 6, 2015 at 0:24 | vote | accept | roro172 | ||
| Feb 5, 2015 at 21:40 | comment | added | Mark | Counting upwards from $x=r$ to $x=n$ is equivalent to counting downwards from $j=n-r$ to $j=0$ ($j$ being the 'distance' between $x$ and $n$). You can just substitute $j = n - x$ into the limits of the sum: $\sum_{x=r}^n \equiv \sum_{j=n-r}^{n-n} \equiv \sum_{j=n-r}^0 \equiv \sum_{j=0}^{n-r}$ | |
| Feb 5, 2015 at 20:59 | comment | added | roro172 | I am still unclear on how you managed to change the upper and lower bounds of the sum? | |
| Feb 5, 2015 at 5:29 | history | answered | Mark | CC BY-SA 3.0 |