www.gusucode.com > stats 源码程序 matlab案例代码 > stats/AnsariBradleyOneSidedHypothesisTestExample.m
%% Ansari-Bradley One-Sided Hypothesis Test %% % Load the sample data. Create data vectors of miles per gallon (|MPG|) % measurements for the model years 1982 and 1976. load carsmall x = MPG(Model_Year==82); y = MPG(Model_Year==76); %% % Test the null hypothesis that the miles per gallon measured in cars from % 1982 and 1976 have equal variances, against the alternative hypothesis % that the variance of cars from 1982 is greater than that of cars from 1976. [h,p,stats] = ansaribradley(x,y,'Tail','right') %% % The returned value of |h = 0| indicates that |ansaribradley| does not % reject the null hypothesis that the variance in miles per gallon is the % same for the two model years, when the alternative is that the variance % of cars from 1982 is greater than that of cars from 1976.