These numbers come directly form www.baseballprospectus.com. How they got these numbers is by running a simulation of the final games of the season 1 million times and taking the stats from that simulation.
If the percentages from that simulation are accurate, then the Astros have...
- .00958% chance to be the NL Champions
- .38338% chance to be the Wild Card Champions
- .39296% chance to make the playoffs
So basically what it's saying is the chances of us making the playoffs are slim... SEE THIS IS WHY I'M NOT A STATS GUY!!!!!! Well, this isn't really a stats thing... more of a probability thing... but you get my point.