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Thread: Linear regression vs ancova - when to use which

  1. #1
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    Linear regression vs ancova - when to use which

    Hi all, I have some data on species richness, latitude and temperature. In the past on this sort of data I have used multi-linear regression. But it was suggest that maybe I use ancova for this. As far as I can see from my web research both would be satisfactory, but I'm not really sure as to when to use one over the other.

    I've run both tests, multi-regression both lat and temp where significant predictors of species richness, but using ancova latitude was the only significant predictor..

    Am I doing something wrong? When I turn latitude into a catagorical value i.e. north OR south (hemisphere) both latitude and temperature are predictors..

    Confused much? - I am..

  2. #2
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    Re: Linear regression vs ancova - when to use which

    Can you specify what your models are? Because both regression and ancova are special cases of just a "linear model".
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