The basic formula for the Mann-WhitneyU-test is

Select one:

a.

b.

c.

d

The basic formula for the Mann-Whitney Utest is Select one: a_ n(1-n) -R - -nam+U U-R.+ U=n(2+D-U 2 D. U = R, + U=n(n+D-U_ 2 O C. U' = R" _ n(n + 1) 2 U -nam-U U-R- _n(n+1 U-nm-U 2 d. U = Rn - n(n + 1) 2 U -nam- U U-R. U=non-U 2