Ηη
MATHEMATICS
- Parameter/constant across areas.
- Notation for efficiency/viscosity (in applied contexts).
PROBABILITY
- Rare as a standard; may be a parameter in specific texts.
STATISTICS
- Effect size: η² (ANOVA).
- Other measures: η (by convention in some texts).
PRONUNCIATION
- Ancient Greek
- sound [ɛː]
- Modern Greek
- ήτα [ˈita] · sound [i]
IN FORMULAS
- η² = SQ_entre / SQ_totalEffect size in ANOVA: the share of the variation explained by the groups.See it explained at morrisonkuhlsen.com →
HOW TO WRITE IT — click to copy
lowercase
uppercasesame as the Latin letter: LaTeX has no command for it
DON'T CONFUSE IT
- η n μ ν η has a right leg that drops below the baseline; the Latin n doesn't.
Note: notations vary between books/fields; these are the most common usages.