The correct answer is 4/19 value will be obtained for r2.
An effect size is an estimate of that number based on a sample that measures the magnitude of the association between two variables in a population. It can refer to the value of a parameter for a fictitious population, the value of a statistic generated from a sample of data, or the equation that operationalizes how statistics or parameters result in the impact size value. The correlation between two variables, the regression coefficient in a regression, the mean difference, or the likelihood that a specific event (like a heart attack) will occur are examples of effect sizes. Effect sizes are an important component of power analyses, sample size planning, and meta-analyses. They are a complement to statistical hypothesis testing.
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