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Miha Kralj
2026-02-26 22:02:52 -08:00
parent 9ab37c1200
commit 8a1ba95173
317 changed files with 18704 additions and 622 deletions
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lib/statistics/jb/Jb.cs
+2 -2
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@@ -346,11 +346,11 @@ public sealed class Jb : AbstractBase
}
// m₃ = (Σx³ - 3·mean·Σx² + 2·n·mean³) / n
double m3Numerator = sumCu - 3 * mean * sumSq + 2 * n * meanSq * mean;
double m3Numerator = Math.FusedMultiplyAdd(-3 * mean, sumSq, Math.FusedMultiplyAdd(2 * n * meanSq, mean, sumCu));
double m3 = m3Numerator / n;
// m₄ = (Σx⁴ - 4·mean·Σx³ + 6·mean²·Σx² - 3·n·mean⁴) / n
double m4Numerator = sumQu - 4 * mean * sumCu + 6 * meanSq * sumSq - 3 * n * meanSq * meanSq;
double m4Numerator = Math.FusedMultiplyAdd(-4 * mean, sumCu, Math.FusedMultiplyAdd(6 * meanSq, sumSq, Math.FusedMultiplyAdd(-3 * n * meanSq, meanSq, sumQu)));
double m4 = m4Numerator / n;
// Skewness = m₃ / m₂^(3/2)