Math: How to solve ranking equation

[Ether]

Originally Posted by Rachel Lim

Please let me know if anything is wrong and I'll correct try to correct it.

There's an extra word in that sentence.

[Rachel Lim]

Originally Posted by Ether

There's an extra word in that sentence.

Thanks for catching that. Did you find any errors in my analysis?

[Ether]

Originally Posted by Rachel Lim

Thanks for catching that. Did you find any errors in my analysis?

Based on the paper you wrote for Math Quiz 6, I wouldn't expect to find any :-)

[ATannahill]

Originally Posted by MooreteP

Plus, for Qualifications, if the number of teams is not divisible by six, there are surrogate matches, which are the third match for teams that fill the surrogate role.

More Math!

Not quite correct.

If the number of teams * the number of matches per team is not a multiple of six, then you will have surrogates.

Michigan (and I believe most other district systems) gives each team 12 matches. A benefit to this is that there will never be a surrogate.

[Danny Diaz]

Originally Posted by Rachel Lim

If you're looking for a more visual explanation (or a simpler one), I wrote up this summary for my team: http://goo.gl/lx2I2l

Impressive.

-Danny

[who716]

Originally Posted by Rachel Lim

If you're looking for a more visual explanation (or a simpler one), I wrote up this summary for my team: http://goo.gl/lx2I2l

I tried to explain the math behind it without calculus or too much statistics, which makes it easier to read but not nearly as in depth as the official explanation (in my opinion). It's mostly a graphical / algebra based analysis to get at the basics of what district ranking is and how your ranking at an event factors into it.

Note: I haven't taken any statistics classes and we're not yet in districts, so I'm not sure if everything I wrote is completely accurate. Please let me know if anything is wrong and I'll try to correct it.

this was actually helpful and understandable, helped me grab the actual meaning behind the inverse error function instead of just plugging it into a calculator too solve.

[Danny Diaz]

In case you're looking for something in Excel, here's something I whipped up.

http://www.chiefdelphi.com/media/papers/3117

-Danny