Mann-Whitney U Test
Formula:
$$ \begin{aligned} U_1 & = n_1n_2 + \frac{n_1(n_1+1)}{2}-R_1\ U_2 & = n_1n_2 + \frac{n_2(n_2+1)}{2}-R_2\ \end{aligned} $$
The test statistic is $U=min{U_1,U_2 }$.
The critical value of U is $U_{\alpha, n1,n2}$
Related Resources
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