[R] Significance test for discrete data

2007-05-10 Thread Alexander Kollmann
Hello, given situation: - pre / post test comparison of discrete, paired data [values can be 1,2,3,4]. - the data are neither normal distributed nor symetric Which test should I use to calculate the p-value? Is the wilcoxon rank sum test ok ? Alex

Re: [R] Significance test for discrete data

2007-05-10 Thread Christophe Pallier
The Wilcoxon paired rank sign test assumes symmetry. (cf. http://www.basic.northwestern.edu/statguidefiles/srank_paired_alts.html ) Christophe Pallier On 5/10/07, Alexander Kollmann [EMAIL PROTECTED] wrote: Hello, given situation: - pre / post test comparison of discrete, paired data

Re: [R] Significance test for discrete data

2007-05-10 Thread Peter Dalgaard
Christophe Pallier wrote: The Wilcoxon paired rank sign test assumes symmetry. (cf. http://www.basic.northwestern.edu/statguidefiles/srank_paired_alts.html ) ...of differences, and under the null hypothesis. This is usually rather uncontroversial. With only 7 different outcomes for