Explore Pearson r, Spearman ρ, Kendall τ, and covariance through interactive scatter plots. Uncover Anscombe's Quartet, four datasets with identical statistics but wildly different shapes, and learn why correlation never implies causation.
Sign in to track progress
Click to add · Drag to move · Right-click to remove
Pearson r
0.513
Moderate positive linear association. X explains 26% of variation in Y.
Covariance (sample, n-1)
115.37
R²
0.263
p-value
0.021
Significance
SignificantOLS Line
ŷ = 0.569x + 16.146
Rank Correlations
n = 20 points