In order to confirm a research hypothesis in a factorial design ...

[Kikoku]

In order to confirm a research hypothesis in a factorial design there must be both
 
  a. a correct research hypothesis and a significant interaction.
  b. a Type 1 and a Type 2 error.
  c. a p-value and a two-tailed test.
  d. a significant interaction and a predicted pattern of observed means.

Question 2

Which of the following is likely to decrease experimentwise alpha in a factorial design?
 
  a. Adding more factors
  b. Adding more levels to each factor
  c. Using post hoc rather than a priori comparisons
  d. Making all possible cell comparisons

[billybob123]

Answer to Question 1

d

Answer to Question 2

c

[Kikoku]

Thank you!

[billybob123]

Happy to help