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Randy Neil Biostats 35: USMLE Biostats Shorts - Less than 1 minute
Episode Notes
USMLE purpose: Rapid-review a single biostats shortcut in Anki-card style.
How to use this page
- Identify whether the statistic is about agreement, rank, or linear correlation.
- Match to kappa, tau, or Pearson r.
- Open the toggle to confirm.
Episode metadata
| Field | Details |
| Episode | Randy Neil Biostats 35 |
| Topic | Biostats short |
| Runtime | 1 min |
| Published | 2024-02-04 |
| Source | Open YouTube video |
One-liner
Agreement = kappa, ranked association = Kendall tau, linear correlation = Pearson r.
Two raters agree beyond chance?
Cohen’s kappa.
Linear relationship between continuous variables?
Pearson correlation coefficient.
Extra practice
Two physicians rank the same 20 cases from least severe to most severe. Which statistic best assesses association between the two rankings?
Reveal answer & explanation
Kendall’s tau. It is used for ranked/ordinal association.