________ allows researchers to describe (1)how far mean scores have shifted in the population,or (2)the percentage of variance that can be explained by a given variable.

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Effect size is a measure that allows researchers to describe (1) how far mean scores have shifted in the population, or (2) the percentage of variance that can be explained by a given variable. A larger effect size indicates a more significant relationship between variables or a greater impact of the intervention being evaluated.

________ Allows Researchers to Describe (1)how Far Mean Scores Have