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Randy Neil Biostats 34: 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
- Sketch the bell curve.
- Mark the mean and SD.
- Use 68–95–99.7.
Episode metadata
| Field | Details |
| Episode | Randy Neil Biostats 34 |
| Topic | Biostats short |
| Runtime | 1 min |
| Published | 2024-02-04 |
| Source | Open YouTube video |
One-liner
The area below +1 SD is 84% : 50% below the mean plus 34% from mean to +1 SD.
Rapid recall: within 1 SD?
68%.
Rapid recall: below +1 SD?
84%.
Extra practice
A normally distributed variable has mean 100 and SD 15. What percent is below 115?
Reveal answer & explanation
84%. 115 is +1 SD, and the area below +1 SD is 84%.