18 lines
598 B
Matlab
18 lines
598 B
Matlab
x1=[22.4 21.7 24.5 23.4 21.6 23.3 22.4 21.6 24.8 20.0];
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x2=[17.7 14.8 19.6 19.6 12.1 14.8 15.4 12.6 14.0 12.2];
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n1=length(x1);
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n2=length(x2);
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#oneminusalpha = input("Confidence level: (between 0 and 1)");
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oneminusalpha = 0.95;
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alpha = 1-oneminusalpha;
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a1= (mean(x1) - mean(x2) - tinv(1-alpha/2,n1+n2-2)*sqrt(((n1-1)*var(x1)+(n2-2)*var(x2))/(n1+n2-2))*sqrt(1/n1+1/n2));
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a2=(mean(x1) - mean(x2) + tinv(1-alpha/2,n1+n2-2)*sqrt(((n1-1)*var(x1)+(n2-2)*var(x2))/(n1+n2-2))*sqrt(1/n1+1/n2));
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printf("The Confidence interval between population means when sigma1=sigma2 is (%4.3f, %4.3f)\n", a1,a2);
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