While data analysts often focus on the statistical significance with the help of p-values, the effect size determines the practical significance of the results. Therefore, an effect size in statistics is measuring how important the difference between group means and the relationship between different variables. Although the term normalized gain is used in the science domain to measure the pre and post-modifications, it is more common in social sciences to report effect sizes than gains.Ĭan you guess what an effect size could possibly mean now? What is an Effect Size? Whenever changes are made in the curriculum or teaching method in a Chemistry or Physics class, we often want to assess and evaluate these changes to see their effectiveness.
