1. E

    Why use Kruskal-Wallis?

    Hi, I am putting together a course on inference techniques to use when the predictor variable(s) are categorical (ie. have no meaningful order). I am wondering if the Kruskal-Wallis test is still relevant given modern software. My understanding of K-W is that it is a nonparametric...
  2. P

    Follow-up on Kruskal-Wallis

    Hi everybody! I just found this forum and became so happy because I'm in a bit of trouble and have no book to help me right now. I am doing an statistical analysis based on the answers from a survey a friend of mine created. The respondents are visitors to a music festival and the survey...
  3. N

    Likert: Fisher's exact OR Kruskal-Wallis?

    Hi, I've got a survey with 50 responses, and want to test for difference between three subgroups, and strength of association. I'm not happy to treat data as continuous. But I'm not sure whether I should use Kruskal-Wallis to compare rating scores between groups, or Fisher's Exact Test...
  4. R

    Data transformation and kruskal-wallis

    Hi! It's the first time I'm posting in your forum! I'm using statistics in a university project about operations research, and I'm having some doubts...hope you can help me out... I measured the time a given worker takes to perform a task (50 times), then I measured the same worker performing...
  5. U

    Sample Size Difference in Kruskal Wallis- big problem or little problem?

    I know Kruskal Wallis can handle "some" difference in sample size. but is comparing 3 set of data with the sample sizes n=170, n=139, n=44 going to throw things off too much? Thanks
  6. U

    Interpreting the results of Kruskal-Wallis QUESTION

    If I have used Kruskal-Wallis to compare 3 data sets of diameter values for 3 different populations of trees, and the results are significant (H=19.21, df=2, n=156, p<.0001) erpreting results I report that "The mean ranks for diameter are significantly different (H=19.21, df=2, n=156...
  7. B

    Violation of normality assumption for One Way Anova - Non parametric test?

    Hoping somebody can help with this? Recently we conducted a small study with ten participants. Each participant completed the same two tests, 'Test A' and 'Test B', during one session. Five particpants (Group AB) performed test A first, while the remainder performed test B first (Group BA)...
  8. J

    I believe Kruskal-Wallis is the right choice, but where do I go from there?

    Assumption: Tertiary wing feathers are warmer Hypotheses: 1) During cold weather feather mites will accumulate on the tertiary wing feather 2) During warm weather feather mites will spread evenly over the entire wing In winter 2010-11 and summer 2011 I took exact counts of feather mites for...