Which of these is an assumption that must be met in order to use ...

[JGIBBSON]

Which of these is an assumption that must be met in order to use the between subjects factorial ANOVA to analyze the data of an experiment?
 
  a. The manipulated variables must be fixed rather than random.
  b. The dependent variable must be normally distributed.
  c. There must be an equal number of subjects in each cell of the design.
  d. All of these are assumptions that must be met to use the formulas in the book.

Question 2

Why do between subjects factorial studies rarely have more than three independent variable? It is because _____.
 
  a. they are too hard to interpret with more variables
  b. they are too costly to control properly
  c. they require too many participants
  d. all of these reasons were discussed in the textbook

[joewallace]

Answer to Question 1

D
Although all of these assumptions must be met, it is also possible to overcome any deviations from these characteristics.

Answer to Question 2

A
In a factorial study with four independent variables there would be a total of fourteen separate interactions to interpret

[JGIBBSON]

Thanks for the timely response, appreciate it

[bdobbins]

Great answer, keep it coming