After a 2 x 2 factorial ANOVA has been used to determine that a statistically significant relationship exists between the dependent variable and an independent variable,a(n)____ can be calculated to indicate the strength of the relationship. A)t² B)Tukey's HSD C)eta² D)critical difference

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After a 2 x 2 factorial ANOVA, the strength of the relationship can be indicated by measuring the effect size through eta-squared (η²) which represents the proportion of variance in the dependent variable that can be attributed to the independent variable(s). Therefore, the best choice is C, which represents eta-squared. The other options are not relevant in this context.

After a 2 X 2 Factorial ANOVA Has Been Used