The statistics will work properly, but they do assume that the variances are the same in different groups. This assumption is generally ok if you have a balanced design, which you don't. Also, your p-values are going to be driven by the lowest number of subjects. With only 5 you might not see much of an effect
On 07/30/2015 01:53 PM, Dibashree Tamuli wrote: > Dear Freesufer Experts, > I would like to ask about any tool of freesurfer for comparing > cortical thickness of different sample size. Let me describe: I have > 3 groups of different sample size (n=25, n=15, n=5) and control (n=8). > Is it possible to compare ? > > Thanks and regards > Dibashree > AIIMS, New Delhi > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
