Extension test page is an administrative page used to test the proper operation of extensions that have been installed on the wiki.

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## Code editor

(Wiki admins only) Edit MediaWiki:Print.css and toggle the editor toolbar.

## HTML test

This is not an extension, but it checks HTML functionality.

## Math

To purge a page with math formulas (refresh the server's cache), append ?action=purge&mathpurge=true to the URL.

Suppose random variable X can take value x1 with probability p1, value x2 with probability p2, and so on, up to value xk with probability pk. Then the expectation of this random variable X is defined as

${\displaystyle{\displaystyle\operatorname{E}[X]=x_{1}p_{1}+x_{2}p_{2}+x_{2}p_{% 3}+x_{3}p_{4}\ldots+x_{k}p_{k}\;.}}$

Since all probabilities pi add up to one: p1 + p2 + ... + pk = 1, the expected value can be viewed as the weighted average, with pi’s being the weights:

${\displaystyle{\displaystyle\operatorname{E}[X]={\frac{x_{1}p_{1}+x_{2}p_{2}+% \ldots+x_{k}p_{k}}{p_{1}+p_{2}+\ldots+p_{k}}}\;.}}$

## Parser functions

{{#ifeq: 1e3 | 1000 | equal | not equal}} equal

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## References

Test Citation[1]

1. This is a citation

## SyntaxHighlight_GeSHi

def quickSort(arr):
less = []
pivotList = []
more = []
if len(arr) <= 1:
return arr
else:
pass