File:Chi-square median approx.png
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Summary
| Description |
English: This replacement for the en.wikipedia's non-free and not-very-good plot File:Chi on SAS.png (from this blog) shows the numerically computed median of the chi-squared distribution, and the approximation from the Wilson–Hilferty transformation, at integer degrees of freedom (circles) and also as a continuous function that could be transformed to represent the median of the gamma distribution. The median and approximation are too close to see a difference, so their difference (absolute error) is also plotted, and also the relative error, which is difference (median - approx) divided by the true median. For degrees of freedom less than 2/9, the approximation goes negative, so the curves are cut off at that point. |
| Date | |
| Source | Own work |
| Author | Dicklyon |
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:57, 26 November 2020 | | 1,256 × 1,090 (124 KB) | wikimediacommons>Dicklyon | heavier lines, larger circles |
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