# product variance

## English[edit]

### Noun[edit]

**product variance** (*plural* **product variances**)

- (obsolete or rare) Covariance.
**1934**, A. C. Aitken, "Note on Selection from a Multivariate Normal Population",*Proceedings of the Edinburgh Mathematical Society*4, page 106:- From a population characterised by variables , correlated and normally distributed, with means , variances and
**product variances**, a sub-population is extracted […] .

- From a population characterised by variables , correlated and normally distributed, with means , variances and