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Need to use Bonferroni?
http://www.talkstats.com/showthread.php/58947-Need-to-use-Bonferroni?goto=newpost
Sat, 20 Dec 2014 23:33:45 GMTHi there,
I am unsure whether I need to use a Bonferroni correction...
I have conducted 20 paired t-tests to analyse change in scores from...Hi there,

I am unsure whether I need to use a Bonferroni correction...

I have conducted 20 paired t-tests to analyse change in scores from baseline to another time-point (descriptive stats). The variables are anxiety, depression, illness cognitions and coping measures. Most p values are <.001, but a few are close to being non significant so the correction may affect these (if it is needed)

If I do use the Bonferroni correction, is this done within each 'family' of tests, i.e. not anxiety as this is only 1 test, but illness cognitions is around 12 so would be p value/12.

Any help much appreciated! :)
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