Why Should we REPORT Effect Size for Hypothesis Tests (16-10)

Significance tells us that the effect was likely not due to chance. Effect size is a standardized measure of how large the effect was. Cohen’s d is the most commonly used measure of effect size for t tests. There are three statistical reasons to report an effect size: if generalization is not important, if sample size is small, and if sample size is large.

Chapters
0:00 Introduction
0:36 Significance vs. Effect Size
2:20 Cohen’s d effect size
4:30 Why report effect size

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This video is part of a series for an introductory statistics course. It supports an academic course QBA 237 Basic Business Statistics at Missouri State University, College of Business, Department of Information Technology and Cybersecurity. Posted beginning in August 2022.
This series was designed, written, produced, recorded, edited, and posted by Dr. Todd Daniel, a Ph.D. statistician and researcher with extensive experience in academic statistical research and statistics instruction. Dr. Daniel directed a research institute for many years before doing private consulting for Research by Design, LLC. He remains active in teaching and research.

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Statistics Instructors: you are free to link to this video and the playlist for your seated or online statistics course or for other educational purposes.

Edited in Camtasia 2022
Visual and audio content from DigitalJuice.com
Music: Digital Juice Royalty Free Music

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