I wonder where you went to school. Median means that half of the sample is above and half the sample is below.
To explain (and I'll use small words so you'll be sure to understand), the median of the fifty states is that 25 are above the median and 25 are below it. See how that works?
Here's a simpler example in case you're still confused:
Steve makes $5/hour
Bob makes $8/hour
Reggie makes $11/hour
Sylvana makes $14/hour
Benoit makes $17/hour
The median wage is then $11.00/hour. Get it now?
Check out this very complex page[0] (let me know if you need help with the bigger words) that discusses this idea. Good luck. I suspect you're gonna need it.