WordReference Random House Unabridged Dictionary of American English © 2020
analysis of variance, [Statistics.]
  1. Statisticsa procedure for resolving the total variance of a set of variates into component variances that are associated with defined factors affecting the variates. Also called  variance analysis. 
  • 1935–40

Collins Concise English Dictionary © HarperCollins Publishers::
analysis of variance n
  1. any of a number of techniques for resolving the observed variance between sets of data into components, esp to determine whether the difference between two samples is explicable as random sampling variation with the same underlying population
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