3 ms·
30 total people with 15 on placebo seems like a very small sample size to me but a great study to maybe get funding for a bigger one for sure.
by jtwebman 9y ago
30 total people with 15 on placebo seems like a very small sample size to me but a great study to maybe get funding for a bigger one for sure.
- psychometry 9y agoEveryone without statistical training thinks sample sizes are too small, but rest assured these studies are usually planned very deliberately. Power calculations are usually done in advance to determine the necessary sample sizes needed to demonstrate the magnitudes of different hypothesized effects according to a desired confidence level.
- dsjoerg 9y agoIn this day and age one cannot "rest assured" about the quality of statistical practice in science. For example: http://retractionwatch.com/2016/03/16/evidence-based-medicine-has-been-hijacked-a-confession-from-john-ioannidis/ http://retractionwatch.com/2016/03/16/evidence-based-medicin...
- 100ideas 9y agoWhat’s your opinion of this study’s statistical power?
- cwyers 9y agohttp://andrewgelman.com/2017/12/04/80-power-lie/ http://andrewgelman.com/2017/12/04/80-power-lie/
- ebullientocelot 9y agoOftentimes planned deliberately to achieve something that might not be obvious from the content or presentation of the paper.