Displaying 20 results from an estimated 492 matches similar to: "Nemenyi test as a post-hoc test to Kruskal Wallis"

2012 Jan 09

2

Unexpected results using the oneway_test in the coin package

Dear fellow R users,
Keywords: Kruskal-Wallis, Post-Hoc, pair-wise comparisons, Nemenyi-Damico-Wolfe-Dunn test, coin package, oneway_test
I am using the "oneway_test" function in the R package "coin" and I am obtaining results which I cannot believe are accurate. I do not wish to waste anyone''s time and so if the following problem is rather trivial, I apologize,

2005 May 31

6

post hoc kruskal wallis

Hola,
Tengo un problema con el post hoc kruskal wallis. No encuentro en el SSPS
ning??n test estad??stico para el post hoc. En el libro de "Zar" proponen el
Turkey-type nonparametric multicomparison. Mi problema es que tengo muchos
datos y hacerlo a mano es complicado. El R es un programa que conozco menos, no
se si habr?? alguna prueba que pueda servir. Los test del paquete npmc no

2008 Mar 06

2

kruskal wallis post hoc test in R

Hello,
I need nemenyi-test or any other post-hoc test for kruskal-wallis, but I
just can''t find out how to implement this in R.
My data set is nitrite concentrations in four different groups which I
intend to compare. The kruskal-wallis-test showed significance, but I
still don''t know between which groups these significances are.
Can anybody help me with this?
Thanks

2005 May 02

2

Nonparametric Tukey-type multiple comparisons "Nemenyi" test

I am trying to do a Nonparametric Tukey-type multiple comparison
post-hoc test to determine which groups are significantly different. I
have read the dialogue on this topic from the R-help, and am still not
clear why no statistical packages include this test as an option? Is it
not an appropriate test to conduct on non-normally distributed data? Is
the only option to calculate it by hand

2007 Oct 26

1

Post-hoc test for Kruskal-Wallis

Hi there,
I''ve got a small question :
is there any post-hoc test for Kruskal rank sum test integrated in R ?
I know that the Nemenyi test is one of the post-hoc that can be used,
but there''s no (to by knowledge) R function for it.
What should I do ?
Thanks,
Etienne

2009 Mar 30

0

Kruskal-Wallis-test: Posthoc-test?

Hello.
We have some questions concerning the statistical analysis of a dataset.
We aim to compare the sample means of more than 2 independent samples; the
sample sizes are unbalanced. The requirements of normality distribution and
variance homogeneity were not met even after transforming the data. Thus we
applied a nonparametric test: the Kruskal-Wallis-test (H-Test). The null
hypothesis was

2009 Jun 19

2

Post-Hoc Test for Kruskal-Wallis Rank Sum Test

Hi list,
I would like to know if there is a way in R to execute a post-hoc test
(factor levels comparison, like Tukey for ANOVA) of a non-parametric
analysis of variance (kruskal.test() function object). I was looking for
something like the Dunn Test. I’ve searched the internet but nothing seemed
to define a way to it.
Do You have any suggestion? Other equivalent test maybe!
Thanks in

2006 Nov 07

0

Nemenyi test for two way layout data.

I am trying to do a Nonparametric Nemenyi test for multiple comparison in a two way layout data because I need to know the exact distribution. I don?t know if this test is in the R software. I just found a Nemenyi test for a one way design. But in Hollander book the Nemenyi test is in page 253 for to way layout data.
Thank you for your help.

2010 Apr 22

2

Jonckheere-Terpstra test using coin package?

Is it possible to implement the Jonckheere-Terpstra test for ordered
alternatives using the coin package: Conditional Inference Procedures
in a Permutation Test Framework?
I found jonckheere.test{clinfun}, but it uses a normal approximation
when ties are present in the data. To make this concrete, I''ve
include
a small dataset. Thanks. --Dale
Hollander and Wolfe, 1999 Table 6.6, pg

2009 Oct 14

4

post-hoc test with kruskal.test()

Dear R users,
I would like to know if there is a way in R to execute a post-hoc test
(factor levels comparison, like Tukey for ANOVA) of a non-parametric
analysis of variance with kruskal.test() function. I am comparing three
different groups. The preliminary analysis using the kruskal-wallis-test
show significance, but I still don''t know the relationship and the
significance level

2008 Mar 10

4

question for aov and kruskal

Hi R users!
I have the following problem: how appropriate is my aov model under the violation of anova assumptions?
Example:
a<-c(1,1,1,1,1,1,1,1,1,1,2,2,2,3,3,3,3,3,3,3)
b<-c(101,1010,200,300,400, 202, 121, 234, 55,555,66,76,88,34,239, 30, 40, 50,50,60)
z<-data.frame(a, b)
fligner.test(z$b, factor(z$a))
aov(z$b~factor(z$a))->ll
TukeyHSD(ll)
Now from the aov i found that my model

2007 Apr 10

4

When to use quasipoisson instead of poisson family

It seems that MASS suggest to judge on the basis of
sum(residuals(mode,type="pearson"))/df.residual(mode). My question: Is
there any rule of thumb of the cutpoiont value?
The paper "On the Use of Corrections for Overdispersion" suggests
overdispersion exists if the deviance is at least twice the number of
degrees of freedom.
Are there any further hints? Thanks.
--

2009 Apr 20

0

New versions for the distr-family of packages

-------------------------------------------------------------------------------
New versions released for the distr family of package
-------------------------------------------------------------------------------
We would like to announce the availability on CRAN (with possibly a
minor delay until on every mirror) of new versions of our packages
in the "distr"-family (version 2.1),

2009 Apr 20

0

New versions for the distr-family of packages

-------------------------------------------------------------------------------
New versions released for the distr family of package
-------------------------------------------------------------------------------
We would like to announce the availability on CRAN (with possibly a
minor delay until on every mirror) of new versions of our packages
in the "distr"-family (version 2.1),

2003 Jan 30

1

Kruskal-Wallis, Friedman tests and Tukey HSD

Dear all
Is there any way of doing a Tukey HSD post-hoc test after a Kruskal-
Wallis or Friedman rank sum test (in the ctest package)?
Thanks in advance,
Albertus
Dr. Albertus J. Smit
Department of Botany
University of Cape Town
Private Bag Rondebosch
7700
South Africa
Tel. +27 21 689 3032

2008 Feb 07

0

Kruskal-Wallis with binary data

Dear All,
I need to compare 4 groups of binary data having different sample sizes
and would like to know if the non parametric Kruskal-Wallis test
(kruskal.test) can be used for this purpose or not.
Many Thanks,
GK

2011 Nov 15

0

Question regarding Kruskal-Wallis test

Hello,
I need to analyse an experiment with 3 groups:
Control group
Treated group 1 (drug 1)
Treated group 2 (drug 2)
If I use a Kruskal-Wallis test do analyse the data and if I define the
control group as the reference group does the test do then the following
comparisons?
Control group vs. Treated group 1
Control group vs. Treated group 2
Treated group 1 vs. Treated group 2
I am not sure

2008 Oct 22

1

Saving kruskal wallis p-values

Hi everyone,
I am working on analyzing spectra which requires hundreds of kruskal wallis
tests to be performed. Once significant results are found post tests are
performed ect. My questions are: how do I perform all these kw tests and
save just the pvalues in a table? Is there anyway to have R automatically
perform post tests if a result of p<0.05 is found? Currently when I run the
test

2004 May 25

1

Scheire-Ray-Hare extension to Kruskal-Wallis

Hi,
I was wondering if it was possible to do the "Scheirer-Ray-Hare" extension of the Kruskal-Wallis test using R, or if it was possible to use some other non-parametric test for the following situation:
I have continuous data that is grouped by 2 factor variables. I would like a non-parametric test because the group variances are not equal. I would like to look for the effects of

2012 Jun 11

1

Kruskal Wallis Post hoc

Hi, I have searched and found a response to a question similar to mine but
when I tried the code, R says it''s not an actual function so I thought I''d
ask here.
http://r.789695.n4.nabble.com/file/n4633035/Cookies.csv Cookies.csv
I have attached the data I am using. I am trying to look at two things: how
moisture content changes over time, and how it changes