Question

QUESTION 1

An interaction occurs whenever

a. there is one main effect

b. there are two main effects

c. there is no main effect for either factor

d. the existence of an interaction is independent of the main effects

QUESTION 2

1. In a 2 ´ 2 factorial experiment if the effect of one factor is the same at both levels of the second factor, then

   	1.	there is an interaction.
   	2.	the experiment is confounded.
   	3.	there is no interaction.
   	4.	both main effects must be significant.

QUESTION 3

1. For the following data, what numbers are compared to assess the main effect of factor A?
   

   	A1	A2
   B1	20	60
   B2	30	70
   	25	65

   	1.	30; 70
   	2.	60; 70
   	3.	25; 65
   	4.	20; 30

Answer 1

QUESTION 1:..... it is possible for interaction effect to be present in two factor ANOVA with out significant main effect d. the existence of an interaction is independent of the main effects QUESTION 2:......if the effect of one factor is the same at both levels of the second factor, then both main effects must be significant 4.both main effects must be significant. QUESTION 3 : for the two factor experiment, the main effct of A

3).

25; 65

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