Jeff E. Houlahan <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> A colleague is looking at the relative amounts of two different types
> of fatty acids (say, fatty acids A and B) that are incorporated in two
> different types of tissues. He is comparing the ratio of A:B in the
> two tissues but the data are heteroscedastic.....he has tried
> several transformations but nothing is stabilizing the variance. Is
> there a transformation that is specifically for ratios (the ratios range
> from 1:5 to 5:1)? Thanks a lot.
The obvious transformation with ratios is logs, but presumably
that was already considered.
Glen
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