Re: [R] kruskalmc, significant differences while median values are the same

2012-12-16 Thread Omphalodes Verna
ree species right solution?  thanks, OV From: Thomas Lumley To: Omphalodes Verna Cc: R Help Sent: Sunday, December 16, 2012 11:59 PM Subject: Re: [R] kruskalmc, significant differences while median values are the same On Sat, Dec 15, 2012 at 10:04 PM, Omphalodes Verna wrote: De

Re: [R] kruskalmc, significant differences while median values are the same

2012-12-16 Thread Thomas Lumley
On Sat, Dec 15, 2012 at 10:04 PM, Omphalodes Verna < omphalodes.ve...@yahoo.com> wrote: > Dear list! > > I work with multiple Kruskal-Wallis test (kruskalmc, package pgirmess), > which evaluates differences in medians among groups (5 groups). A result of > a test is significant differences among s

Re: [R] kruskalmc, significant differences while median values are the same

2012-12-15 Thread Pascal Oettli
Hello, What about the median ranks? This test is based on ranks. Regards, Pascal Le 12/12/15 18:04, Omphalodes Verna a écrit : Dear list! I work with multiple Kruskal-Wallis test (kruskalmc, package pgirmess), which evaluates differences in medians among groups (5 groups). A result of a tes

[R] kruskalmc, significant differences while median values are the same

2012-12-15 Thread Omphalodes Verna
Dear list! I work with multiple Kruskal-Wallis test (kruskalmc, package pgirmess), which evaluates differences in medians among groups (5 groups). A result of a test is significant differences among some groups, while median values are the same for 4 groups (using tapply). Why? p.s.: number of

[R] kruskalmc

2010-09-01 Thread Iasonas Lamprianou
Hi, I would like to find out if the kruskalmc command in the pgirmess package controls for the family-wise type-I error rate. Thank you Dr. Iasonas Lamprianou Assistant Professor (Educational Research and Evaluation) Department of Education Sciences European University-Cyprus P.O. Box 22006 15