stats

Measures of Dispersion

Range, IQR, variance, SD, SEM, skewness, kurtosis — box-and-whisker plot, strip plot, and SD ruler with empirical rule.

Input — Data Set

Numbers (comma or space separated)

Range

Min—

Max—

Range—

Mid-range—

Quartiles

Q1 (P25)—

Q2 median—

Q3 (P75)—

IQR = Q3 − Q1—

Lower fence—

Upper fence—

Outlier count—

Variance

Variance (pop) σ²—

Variance (samp) s²—

SD (pop) σ—

SD (samp) s—

SEM = s/√n—

Bessel's correction: s² uses (n−1) denominator to correct for bias when estimating population variance from a sample

Shape

Skewness g₁—

Kurtosis g₂—