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Thread: Anova find significant diferrences

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    Anova find significant diferrences




    Hi all,
    I have made an one-way anova in order to test if three
    populations have the same means.
    My result is to reject the null hypothesis. So,
    I understand that at least two populations have different means.

    I would like to compute the significant differences and then to find which subgroups have different means.

    Any ideas ?
    could you help me please ?

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    Re: Anova find significant diferrences

    what program are you using?

    If R, I can give you some quick code to output the means table.


    Usually that is the way to do this in interpreting ANOVA results, look at the means table and the standard error of means.

    Or are you asking how to do this by hand?

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    Re: Anova find significant diferrences

    I am using excel 2010 (Data Analysis Tool)

    And my results are the following :

    Anova: Single Factor

    SUMMARY
    Groups Count Sum Average Variance
    Column 1 5 245 49 7,5
    Column 2 5 280 56 12,5
    Column 3 5 255 51 3,5


    ANOVA
    Source of Variation SS df MS F P-value F crit
    Between Groups 130 2 65 8,29787234 0,005461086 3,885293835
    Within Groups 94 12 7,833333333

    Total 224 14


    What is the result about each subgroup ?

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    Re: Anova find significant diferrences

    Try using a Tukey's post hoc test.

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    Re: Anova find significant diferrences


    Thanks a lot for your answers

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