两样本独立T检验MATLAB代码

X=[62.780.380.468.673.372.271.572.381.574.270.153.974.67358.774.979.359.978.678.677.177.285.67869.273.873];Y=[68.17474.671.272.166.365.36678.268.861.668.368.872.665.769.974.565.472.675.872.271.677.171.568.27271.5];[H,P,CI]=ttest(X,Y)%H表示在显著性水平为0.05下，H=1时能拒绝原假设，验的零假设H0为两总体均值之间不存在显著差异%p0.05拒绝H0有显著性差异%Cl均值μ的0.95置信区间不跨越0时说明有显著性差异[Muhat,sigmahat,muci,sigmaci]=normfit(X)%Muhat为均值muci为均值0.95置信区间%sigmahat为标准差sigmaci标准差0.95置信区间a=Muhat;b=sigmahat;Cx=b/a%X的变异系数[Muhat,sigmahat,muci,sigmaci]=normfit(Y)%Muhat为均值muci为均值0.95置信区间%sigmahat为标准差sigmaci标准差0.95置信区间a=Muhat;b=sigmahat;Cy=b/a%Y的变异系数如果CxCy,则说明x比y更可靠ifCxCydisp('x比y变异系数小，更稳定，结果更可靠')elsedisp('y比x变异系数小，更稳定，结果更可靠')end