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The Effect Size Calculation skill empowers researchers and data scientists to move beyond statistical significance by quantifying the practical impact of their results. It supports a wide range of standardized metrics, including Cohen’s d for group differences, Pearson’s r for correlations, and Eta-squared for ANOVA, providing necessary context for meta-analyses, grant applications, and study planning. By integrating automated calculations with mandatory confidence interval reporting, this skill ensures that Claude Code produces robust, publication-ready statistical interpretations that meet modern scientific standards.
