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Thread: Comparing standard deviations

  1. #1
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    Comparing standard deviations




    Hi,

    I have data about incomes from two groups and I want to see which group's variance is bigger.

    The two groups income is measured in the same currency, so can I simply compare the standard deviation? Or should I use the coefficient of variation?

    (The means are different)

    Thanks for your help.

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    Re: Comparing standard deviations


    You could use the F_{max} test also I think it's called Hartley. Never used it myself but learned about it in stats 1. It's similar (maybe the same thing) to what an anova does when it compares variances.
    Last edited by TheEcologist; 11-14-2013 at 09:21 AM. Reason: fixed math tags
    "If you torture the data long enough it will eventually confess."
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