Many thanks to all who kindly provide such helpful advice. I can see how
useful the significance level would be and I, too, would be grateful for
details of both the AnoVa and the correlation usage
Carole.
>
> My personal preference is to use AnoVa or correlation (depending on the
> scoring scheme for the question) to analyse class performance. A
> correlation coefficient has the same usefulness as for example a
> disrimination index but it is accompanied by a significance level so
> you know when to take it with a pinch of salt.
>
> I can give some details of this if people think it will be of interest
> and I would welcome criticism.
>
> Jon Maber
>
>
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