🛠️ Invention or technique

Contingency table

Tabla de contingencia

Date
1904 · confidence high
Place
London, United Kingdom
Credited to
Karl Pearson
Field
Knowledge & symbols

What it is

A matrix-format table showing the joint frequency distribution of several variables, used to find relationships between them; the term was coined by Karl Pearson in 1904.

What it led to

  • Statistical independence tests such as chi-squared
  • Pivot tables in spreadsheet software
  • Analysis of multivariate dependence structures

Links

Sources✓ verified 2026-09-28