www.gusucode.com > stats 源码程序 matlab案例代码 > stats/PairedSampletTestExample.m

    %% Paired-Sample t-Test  

%% 
% Load the sample data. Create vectors containing the first and second columns
% of the data matrix to represent students’ grades on two exams. 
load examgrades
x = grades(:,1);
y = grades(:,2);  

%% 
% Test the null hypothesis that the pairwise difference between data vectors
% |x| and |y| has a mean equal to zero. 
[h,p] = ttest(x,y) 

%%
% The returned value of |h = 0| indicates that |ttest| does not reject the
% null hypothesis at the default 5% significance level.