A 3 x 3 x 3 x 3 design has _____ potential main effects.

4

3

81

12

How many levels are in each factor of a 2 x 2 ANOVA?

Group of answer choices

2

4

8

cannot determine

Within subjects designs increase statistical power relative tobetween subjects designs because:

Group of answer choices

individual differences are reduced or absent

systematic variance is reduced

error variance is increased

none of these statements are true