Can We COMPARE Significance? A Tale of Two Studies (16-11)

Two drugs are being for their effectiveness. The first study found a statistically significant difference between the experimental and placebo groups. The second study did not find a statistically significant difference. If one study is significant and the other is not, is the drug in the significant study more effective? The difference between “significant” and “non-significant” is not itself statistically significant. We cannot compare p values; instead, report an effect size, which is comparable.
This video uses Stats Blocks to illustrate the statistical concepts of hypothesis testing. Stats Blocks were designed by Dr. Todd Daniel to explain abstract statistical concepts using concrete illustrations and inductive reasoning.

Chapters
0:00 We cannot compare p values
0:50 You must be this tall to ride
1:57 Is Luke taller than a Stormtrooper
5:13 You can compare effect sizes

Gelman, A. & Stern, H. (2006). The difference between “significant” and “not significant” is not itself statistically significant. The American Statistician, 60,(4), 328-331. DOI: 10.1198/000313006X152649 http://www.stat.columbia.edu/~gelman/...

Rosnow, R.L. & Rosenthal, R. (1989). Statistical procedures and the justification of knowledge in psychological science. American Psychologist, 44, 1276-1284.
https://citeseerx.ist.psu.edu/viewdoc...

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
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.

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
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

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
Link to a Google Drive folder with any files that I use in the videos.
https://drive.google.com/drive/folder...
To download, hover your cursor over the file icon and a blue download icon will appear. You do not need to request access to a file.