If n₁ = 6, n₂ = 8 and a = 0.05_{2 tail}, U_crit value is ____.

The Mann-Whitney U test is used with ____.

an independent groups design

a replicated measures design

a correlated groups design

none of the other three options

8

40

6

42

A contingency table ____.

is a two-way table

involves two variables

involves two mutually exclusive variables

is a two-way table and involves two variables

If N = 18 and a = 0.05_{2 tailed}, the value of T_crit is ____.

40

39

-41

47