welchanovawd

Version 1.3.0.0 (3,3 KB) von Antonio Trujillo-Ortiz
Welch ANOVA Test for Unequal Variances without data.
0.0
(0)
392 Downloads
Aktualisiert 2. Mai 2013

Lizenz anzeigen

The ANOVA F-test to compare the means of k normally distributed populations is not applicable when the variances are unknown, and not known to be equal. A spacial case, k=2, is the famous Behrens-Fisher problem (Behrens, 1929; Fisher, 1935). Welch (1951) test was proposed to fill this void, a generalization to his 1947 previous paper (Welch, 1947).

This m-file works without all the data samples. But only with the size, mean and variance samples.

Syntax: function welchanova(x,alpha)

Inputs:
x – data nx2 matrix (Col 1 = data; Col 2 = sample code)
alpha - significance level (default=0.05)

Outputs:
- Summary statistics from the samples
- Decision on the null-hypothesis tested

Zitieren als

Antonio Trujillo-Ortiz (2024). welchanovawd (https://www.mathworks.com/matlabcentral/fileexchange/37123-welchanovawd), MATLAB Central File Exchange. Abgerufen.

Kompatibilität der MATLAB-Version
Erstellt mit R2010a
Kompatibel mit allen Versionen
Plattform-Kompatibilität
Windows macOS Linux

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Version Veröffentlicht Versionshinweise
1.3.0.0

We improve the code. Thanks to Dr. Jürgen Kayser, Department of Psychiatry, Columbia University Research Scientist, Cognitive Neuroscience, New York State, who suggest us to remove a bug.
1.1.0.0

It was added an appropriate format to cite this file.
1.0.0.0