heteroscedasticity.

Unequal variance of errors or measurements across observations, groups, or predictor values.

Use it for

Words that belong together

• conditional heteroscedasticity
• test for heteroscedasticity
• heteroscedasticity-robust standard errors

On the page

The residual plot suggested heteroscedasticity because the spread increased with household income.

Usage notes

Primary category: academic / formal / analytical. Lexical Type: Word. Forms: Usually uncountable; no ordinary plural in this sense. Commonness: uncommon (editorial estimate; not a corpus frequency statistic). Legacy lexical fields mirror sense 1; numbered fields keep each relevant meaning separate. Research distinction: Dictionary and statistical reference distinguish unequal conditional variances from bias, independence, and causation. Alternate k-spelling retained as an alias. Writing functions: statistical reasoning, methodological precision.