Werk #5465: Fixed calculation of standard deviation.
| Component | Livestatus | ||
| Title | Fixed calculation of standard deviation. | ||
| Date | Nov 24, 2017 | ||
| Level | Trivial Change | ||
| Class | Bug Fix | ||
| Compatibility | Compatible - no manual interaction needed | ||
| Checkmk versions & editions |
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Note: This fixes only a slightly esoteric feature, namely "Stats: std ..." headers. Normal users are not affected, only those using this header via self-written scripts.
Livestatus incorrectly used a bias correction when calculating the standard deviation. For more mathematical background see:
https://en.wikipedia.org/wiki/Bessel%27s_correction http://mathworld.wolfram.com/StandardDeviation.html