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Thread: Chi-Square and Genetics

  1. #1 Chi-Square and Genetics 
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    Jan 2010
    I'm very confused about chi-square. The equation I have for it is [(observed-expected)^2] / expected. But using the critical values of chi-square table, it seems that the higher the chi-square, the more likely the results are NOT due to chance, AKA the null hypothesis can be rejected. But how does this make sense? Chi-square increases as the deviation between observed and expected increases, so shouldn't the probability that the results are NOT due to chance increase as Chi-square DECREASES, rather than increases?

    This is for the AP Biology Lab Seven: Genetics of Organisms, by the way.

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