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Hi, I'm trying to help a friend who is doing a thesis in a nurse college, to evaluate medical question forms. There are about 30 questions giving more than 110 parameters to describe each responding person's (gender, health etc.) and there are about 120 question forms to evaluate. I have basically 2 questions. 1. What to search for. 2. How to evaluate it statisticaly. As for No. 1. I have

Hi, I want to permutate the following matrix and replace permutated columns. Is it possible to control the number of columns permutated. Let's say I only want to permute two columns. Can i do that with the sample method or should i any bootstrapping method ?? I'm not sure this is the best statisticaly way of doing it...?? So the idea behind is to ramdonly generate 1000 permutated