Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| 2 years old | 3 years old | 4 years old | |
|---|---|---|---|
| Sample number (N) | 535 | 851 | 734 |
| Mean (kg) | 468.8 | 473.9 | 478.8 |
| SD (kg) | 26.1 | 28.0 | 27.6 |
| Minimum (kg) | 382 | 390 | 395 |
| First quartile (kg) | 452 | 456 | 460 |
| Second quartile (kg) | 468 | 473 | 478 |
| Third quartile (kg) | 485 | 492 | 496 |
| Maximum (kg) | 568 | 568 | 604 |
