Welch's t-test: Difference between revisions
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<pre>(0.021378001462867013 0.14884169660532798 0.035972271029796624 0.09077332428567102 0.01075139991904718)</pre> |
<pre>(0.021378001462867013 0.14884169660532798 0.035972271029796624 0.09077332428567102 0.01075139991904718)</pre> |
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=={{header|SAS}}== |
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{{trans|Stata}} |
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<lang sas>proc iml; |
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x = {3.0,4.0,1.0,2.1}; |
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y = {490.2,340.0,433.9}; |
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n1 = nrow(x); |
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n2 = nrow(y); |
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v1 = var(x); |
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v2 = var(y); |
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t = (mean(x)-mean(y))/(sqrt(v1/n1+v2/n2)); |
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df = (v1/n1+v2/n2)**2/(v1**2/(n1**2*(n1-1))+v2**2/(n2**2*(n2-1))); |
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p = 2*probt(-abs(t), df); |
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print(t || df || p); |
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quit;</lang> |
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'''Output''' |
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<pre>-9.559498 2.0008523 0.0107516</pre> |
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=={{header|Scilab}}== |
=={{header|Scilab}}== |
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{{trans|Stata}} |
{{trans|Stata}} |
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