Sample Size
Size of sample needed to yield error of 5% or less in 95 out of 100 samples
|
Population Size |
Obtained Sample Size |
Percent of
Population |
| 50 | 45 | 90 |
| 100 | 80 | 80 |
| 200 | 132 | 66 |
| 300 | 168 | 56 |
| 400 | 196 | 49 |
| 500 | 218 | 43 |
| 600 | 234 | 39 |
| 800 | 240 | 32 |
| 1,000 | 278 | 27 |
| 2,000 | 323 | 16 |
| 3,000 | 341 | 11 |
| 5,000 | 357 | 7 |
| 6,000 | 361 | 6 |
| 8,000 | 367 | 4 |
| 10,000 | 370 | 3 |
| 15,000 | 375 | 2 |
| 20,000 | 377 | 1.8 |
| 30,000 | 379 | 1.2 |
| 50,000 | 381 | 0.7 |
| 75,000 | 382 | 0.4 |
| 100,000 | 383 | 0.03 |
Source: Michigan State Univeristy OMERAD Medical Education Section