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Thread: Comparing mean and median values

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    Comparing mean and median values




    Hi everyone,

    I'm working with Stata to compare the mean and median values of several continuous variables between 2 independent samples (sample size > 100 in each group). Some distributions are heavily skewed, while others have a relatively normal distribution.

    I plan on using paired T tests for the mean values (unless you have a suggestion for a better approach).

    Any suggestions on appropriate ways to test differences in median values?

    Thanks, I appreciate any feedback.

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    Re: Comparing mean and median values

    Hi,
    1) this seems odd to me:
    between 2 independent samples
    Vs
    using paired T tests
    2) why comparing both means and medians?

    Gm
    http://cainarchaeology.weebly.com/

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    simonja (03-13-2014)

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    Re: Comparing mean and median values

    Hi, thanks for your response.

    I'm comparing 2 groups within a single National Survey. Maybe this would be better described as a 2 sample t test?

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    Re: Comparing mean and median values

    Hi,
    may be my point was not so clear in my earlier reply. Sorry.
    Are your samples independent? If they are, use a 2-sample t-test.
    Besides, I was wondering why you planned to also test for a difference in median value.

    Gm
    http://cainarchaeology.weebly.com/

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    simonja (03-13-2014)

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    Re: Comparing mean and median values


    Quote Originally Posted by simonja View Post
    Hi everyone,
    Some distributions are heavily skewed, while others have a relatively normal distribution.
    Thanks, I appreciate any feedback.
    Have you checked the assumption of equal varainces (from your residuals)?
    The earth is round: P<0.05

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    simonja (03-13-2014)

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