ANOVA
UK[əˈnəʊvə]US[əˈnoʊvə]
n
A statistical method used to compare the means of three or more groups to determine if at least one group mean is significantly different from the others.
Morpheme Breakdown
an
ova
an
prefix
ova
base
Etymology
ANOVA is an initialism, not a word formed from classical morphemes. It stands for "Analysis of Variance," a term coined by the English statistician Ronald Fisher in the early 20th century. The name directly describes the method's purpose: it is an analytical technique that decomposes the total observed variance in data into components attributable to different sources. As a fixed acronym, it entered the lexicon of statistics and scientific English as a simplex noun, its internal structure frozen and treated as a single unit.
Analysis
Structure: an (prefix) + ova (base)
- an: A Greek prefix meaning "not" or "without," but in this context, it is a clipped form of "analysis."
- ova: A clipped form of "of variance," referring to the statistical concept of variance (the spread of data points).
Examples
The researcher used a one-way ANOVA to test for differences in plant growth across four fertilizer types.
A significant result from the ANOVA indicates that further post-hoc tests are needed to identify which specific groups differ.
Understanding the assumptions, like homogeneity of variances, is crucial before conducting an ANOVA.