$\mathrm{\tau }=\underset{¯}{{\mathrm{n}}_{\mathrm{c}}-{\mathrm{n}}_{\mathrm{d}}}$	n represents sample size
1/2n(n − 1)	nc is the number of concordant pairs
$\mathrm{z}=\underset{¯}{3*\tau *\surd \mathrm{n}\left(\mathrm{n}-1\right)}$	nd is the number of discordant pairs
√ 2(2n + 5)