welchanova

バージョン 1.1.0.0 (3.79 KB) 作成者: Antonio Trujillo-Ortiz
Welch ANOVA Test for Unequal Variances.
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更新 2012/6/11

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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

引用

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

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