F-test for the equality of means

Hi, how can i test for equality of means for >2 vectors?, Thanks in advance

Answer 1

[Wayne King]

You can use anova1() to compare the means of two or more groups.

That function returns the F statistic in the optional anovatab argument.

strength = [82 86 79 83 84 85 86 87 74 82 ...
            78 75 76 77 79 79 77 78 82 79];
alloy = {'st','st','st','st','st','st','st','st',...
         'al1','al1','al1','al1','al1','al1',...
         'al2','al2','al2','al2','al2','al2'};
[p,anovatab,stats] = anova1(strength,alloy);

Answer 2

[Image Analyst]

There are pretty good discussions on Wikipedia:

http://en.wikipedia.org/wiki/F_test

http://en.wikipedia.org/wiki/T_test

[conrad Landis]

To be more specific, is there a built in matlab function to coduct such a test? ttest and ttest2 just allow testing for max 2 vectors. Thx,