The reason for beginning data interpretation with the interaction ...

[sam.t96]

The reason for beginning data interpretation with the interaction rather than the main effect is
 
  A) that it is more convenient to do it that way.
  B) to avoid reaching the erroneous conclusion that the main effect has more explanatory power than it warrants.
  C) that it is traditional to begin with the interaction.
  D) that it is easier to rule out the effects of the interaction this way.

Question 2

In performing an ANOVA, the degrees of freedom associated with the error variance are calculated by
 
  A) taking the total number of participants and subtracting the number of cells.
  B) multiplying the total number of participants by the number of cells.
  C) subtracting one from the total number of participants.
  D) taking the product of the degrees of freedom for the main effects.

[raenoj]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: A