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Thread: How to interpret aov table for Error:Within from R

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    How to interpret aov table for Error:Within from R




    I have sleep data where there are 5 groups of people, 4 medications, and 5 different days measured. I ran an aov on in R Studio, but the table came back looking like this:

    Error:Group:Meds
    Group
    Meds
    Residuals

    Error:Within
    Day
    Meds: Day
    Residuals

    What I don't understand is what the Error:Within is reporting. Is it the medication effect changes from day to day OR the day effects change from medication to medication?

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    Re: How to interpret aov table for Error:Within from R

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    Re: How to interpret aov table for Error:Within from R


    Quote Originally Posted by Quixotic42 View Post
    I have sleep data where there are 5 groups of people, 4 medications, and 5 different days measured. I ran an aov on in R Studio, but the table came back looking like this:

    Error:Group:Meds
    Group
    Meds
    Residuals

    Error:Within
    Day
    Meds: Day
    Residuals

    What I don't understand is what the Error:Within is reporting. Is it the medication effect changes from day to day OR the day effects change from medication to medication?
    The AOV reports how much of the total variance is explained by the grouping, and how much variance remains within the groups.

    What makes up an appropriate grouping depends on your question.
    Prediction is very difficult, especially about the future. (Niels Bohr)

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