= Jacob Cohen (statistician)
{wiki=Jacob_Cohen_(statistician)}
Jacob Cohen (1962–1998) was a prominent American psychologist and statistician known for his contributions to the fields of statistics, psychology, and research methodology. One of his most significant contributions is the concept of effect size, which quantifies the size of a difference or a relationship in a population. Effect size measures are vital for understanding the practical significance of research findings beyond traditional hypothesis testing.
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