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OBrientest

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OBrientest

by Antonio Trujillo-Ortiz

 

25 Apr 2003 (Updated 21 Jul 2003)

O'Brien's Test for Homogeneity of Variances.

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Description

In the Obrien's test to check out the homogeneity of variances the data are transforming to
yij = ((nj-1.5)*nj*((xij-mean(xj))**2)-((0.5)*(var(xj))*(nj-1)))/((nj-1)*(nj-2))
and uses the F distribution performing an one-way ANOVA using y as the dependent variable.

MATLAB release MATLAB 5.3 (R11)
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Updates
01 May 2003

It was added an appropriate format to cite this file.

21 Jul 2003

Output results were improved.

Tag Activity for this File
Tag Applied By Date/Time
statistics Antonio Trujillo-Ortiz 22 Oct 2008 07:00:25
probability Antonio Trujillo-Ortiz 22 Oct 2008 07:00:25
obriens test Antonio Trujillo-Ortiz 22 Oct 2008 07:00:25
homoscedasticity test Antonio Trujillo-Ortiz 22 Oct 2008 07:00:25

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