Effect Size: Eta-squared (  2 ) Analagous to R 2 from regression = SS between / SS total = SS B / SS T = proportion of variance in Y explained by X = Non-linear correlation coefficient = proportion of variance in Y explained by X Ranges between 0 and 1 Interpret as for r 2 or R 2 ; a rule of thumb:.01 is small,.06 medium,.14 large
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