## 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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