On Jul 15, 7:11 am, James100 <marylan...@[EMAIL PROTECTED]
> wrote:
> Dear all,
>
> I am an animal nutritionist currently working on fish nutrition in the
> Czech Republic. I am busy with an analysis on the effect of the
> replacement of fishmeal with plant proteins in fish diets. I am
> calculating effect size according to the conventional method of {Mean
> (Control)-Mean(TRT)}/{[SD(Control)+(SD(TRT)]/2}. Unfortunately several
> studies did not re****t SD's or SE's (that I can convert to SD) for
> individual means, but a "SE calculated from the RMS in the ANOVA" or
> a "pooled SEM" over treatments. My problem is as follows:
>
> TRT Growth
> Control 1.65
> 1 1.45
> 2 1.34
> 3 1.87
> 4 1.61
> 5 1.54
> SEM 0.54
>
> I want to calculate an effect size between Control and TRT 3.
> TRT's 2, 4 and 5 are not suitable for my analysis.
> But the SEM was calculated over ALL means.
> How do I eliminate the variance due to the latter treatments
> that I do not include?
>
> I really would appreciate any help. I am in a country where
> people cannot speak English, and I cannot speak their language.
> Furthermore, the knowledge on statistics is very limited.
>
> James Sales
SEM = ??? Standard Error of a Mean?
That would make sense only if all the groups were the same size.
What were the n's?
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