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chi square test — Parallax Forums

chi square test

mctriviamctrivia Posts: 3,772
edited 2010-12-13 04:37 in General Discussion
i am trying to implement a chi square test in php. but i do not understand the math. http://www.graphpad.com/quickcalcs/pvalue1.cfm has a nice calculator that will do what I need labeled P from chi2. wikipedia says the formula is p=1-bcf091858aef021492e9f4f3d0fb43e3.png but this formula contains a bunch of symbols i do not understand.

Anyone much better at math then me able to help?

Comments

  • LeonLeon Posts: 7,620
    edited 2010-12-12 21:18
    Look up the Gamma function, it's a sort of glorified factorial. We used books of statistical tables when I was doing that stuff on my psychology degree course, many years ago,
  • mctriviamctrivia Posts: 3,772
    edited 2010-12-13 04:37
    Thanks will see what I can learn.
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