welchanova

Version 1.1.0.0 (3.79 KB) by Antonio Trujillo-Ortiz
Welch ANOVA Test for Unequal Variances.
3.0
(1)
949 Downloads
Updated 11 Jun 2012

View License

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).

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

Cite As

Antonio Trujillo-Ortiz (2024). welchanova (https://www.mathworks.com/matlabcentral/fileexchange/37121-welchanova), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2010a
Compatible with any release
Platform Compatibility
Windows macOS Linux

Community Treasure Hunt

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

Start Hunting!

Version Published Release Notes
1.1.0.0

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