Skewness Rechner — Formel

How to Estimate Skewness

Pearson's Second Coefficient of Skewness

Skewness = 3 * (Mean - Median) / Standard Deviation

  • Positive skewness: The right tail is longer; the mean exceeds the median.
  • Negative skewness: The left tail is longer; the mean is below the median.
  • Zero skewness: The distribution is symmetric.

    • This is an approximation. The exact moment-based skewness requires raw data.

    Lösungsbeispiel

    A dataset has mean 55, median 50, and SD 10. Estimate the skewness.

    1. Skewness = 3 * (55 - 50) / 10
    2. = 3 * 5 / 10
    3. = 15 / 10 = 1.5
    4. Positive value indicates right skew