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    Repeated measures data




    Hello

    I want to test the significance between the treatments on repeated measures. I have the 3 groups A, B and C and response for them was measured over different dates in three different boxes. I want to compare A, B and C i.e. which group is significantly lower or higher than other. I am attaching the excel file with it. Hope it helps. Thanks for your help in advance. I would really appreciate any suggestions.
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    Re: Repeated measures data

    Hi, I've deleted your other thread, try to avoid duplicate posts.

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    Re: Repeated measures data

    I have the 3 groups A, B and C and response for them was measured over different dates in three different boxes.
    Could you please elaborate a bit? What is the topic of the research,
    what are these groups, how large are they, what was measured,
    how many different dates were there, and what is meant by "in
    three different boxes"?
    I want to compare A, B and C i.e. which group is significantly lower or higher than other.
    So you don't want to know whether the
    three groups develop differently over time,
    but whether one group is generally higher
    than the other groups? You could do this
    by aggregating all measurements of an individual
    (e.g. the mean of all measurements) and
    use this as dependent variable in a oneway
    ANOVA with post hoc tests.

    With kind regards

    K.

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    Re: Repeated measures data

    Hello Karabiner,

    A, B and C are the different covers for soil loss protection. I want to test which cover is significantly better than other. Turbidity was measured for these different groups (A, B and C). Three boxes were placed side by side and we run a simulation rainfall on them for 15 minutes on the boxes on these dates mentioned. The data comes out to be non-normal and I applied non parametric tests but those doesn't look accurate. the standard deviation for each treatments is very high due to variability within boxes and with time. Hope it helps.

    Thanks

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    Re: Repeated measures data


    The design of the study is still not clear to me, I must admit.
    There is 1 and the same area during the whole study period,
    and you put 3 boxes on it on each study day (how many were
    there?), one box representing A, B or C, respectively? And on
    each study day, you measure turbidity within each box after
    15min of rainfall?

    Which non-parametric test did you apply, and why do you
    doubt that the results are accurate?

    With kind regards

    K.

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