About Site Map Submit Contact Us Log in | Create an account
Create an account Log In
Average Rating
User Rating:
Visitors Rating:
My rating:

Write review
See full specifications

scripts default iconKWtest (Scripts) Publisher's description

In statistics, the Kruskal–Wallis one-way analysis of variance by ranks (named after William Kruskal and W

In statistics, the Kruskal–Wallis one-way analysis of variance by ranks (named after William Kruskal and W. Allen Wallis) is a non-parametric method for testing equality of population medians among groups. It is identical to a one-way analysis of variance with the data replaced by their ranks. It is an extension of the Mann–Whitney U test to 3 or more groups. Since it is a
non-parametric method, the Kruskal–Wallis test does not assume a normal population, unlike the analogous one-way analysis of variance. However, the test does assume an identically-shaped and scaled distribution for each group, except for any difference in medians.
The exact distribution of the Kruskal-Wallis statistics is very time, space and memory expensive, so it is approximated using other distribution.
The MatLab function KRUSKALWALLIS only uses the chi-square distribution that is the most conservative (and this means that it accepts the H0 hypothesis more than you want). This function computes also the F, Beta and Gamma approximations (the F distribution is the less conservative and this means that it refuses the H0 more than you want), giving a more informative output (if you want, see.
http://www.jmu.edu/assessment/JPM%20AERA%20SP%2008.pdf). If you believe that the p-value you choose is smaller than your cut-off (usually 0.05), you can use my function Dunn-Sidak to isolate the differences among

System Requirements:

MATLAB 7.6 (R2008a)
Program Release Status: New Release
Program Install Support: Install and Uninstall

KWtest (Scripts) Tags:

Click on a tag to find related softwares

Is KWtest (Scripts) your software?

Manage your software

Most Popular

scripts default icon ASK, OOK, FSK, BPSK, QPSK, 8PSK modulation 1.1
ASK, OOK, FSK, BPSK, QPSK, 8PSK modulation contain several functions for digital modulation simulation
scripts default icon Simulink Communication Labs 1.1
Simulink Communication Labs allows you to learn communication systems in greater depth.
scripts default icon M-QAM modulation and demodulation 1.1
M-QAM modulation and demodulation is the QAM modulation and demodulation tech.
scripts default icon LZW Compression/Decompression 1.1
LZW Compression/Decompression - Updated LZW compressor and decompressor with reasonable performance
scripts default icon InSPIRE utility to plot a 2D displacement field (Scripts) 1.0
This program plots the deformation field (displace vectors) contained in vector.txt.