Dear morphometricians, I have just started using some resampling statistics and I am trying to learn more about it. Many of you have certainly much more experience and might give me advice. Thanks in advance for your help.
I am testing the significance of correlations between PLS vectors using permutations. I've got a correlation of 0.4 between the first PLS vectors of two sets of variables using a pooled sample with males and females. If the analysis is done with separate sexes, the correlation is higher (0.6) but no longer significant with the permutation tests. Does this happen because of the loss of statistical power in the smaller samples of either only males or only females? More generally, I'd be interested to know more about the statistical power of resampling statistics compared to parametric statistics. I am deeply grateful to you for any suggestion. Cheers Andrea Dr. Andrea Cardini Hull York Medical School The University of York, Heslington, York YO10 5DD, UK & The University of Hull,Cottingham Road, Hull HU6 7RX, UK tel. 01904 321752 fax 01904 321696 E-mail: [EMAIL PROTECTED] http://www.york.ac.uk/res/fme/people/andrea.htm ------------------------------------------------------------------------- Visita http://domini.interfree.it, il sito di Interfree dove trovare soluzioni semplici e complete che soddisfano le tue esigenze in Internet, ecco due esempi di offerte: - Registrazione Dominio: un dominio con 1 MB di spazio disco + 2 caselle email a soli 18,59 euro - MioDominio: un dominio con 20 MB di spazio disco + 5 caselle email a soli 51,13 euro Vieni a trovarci! Lo Staff di Interfree ------------------------------------------------------------------------- -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
