A 2 3 4 factorial design has _____ potential main effects.

A 2  3  4 factorial design has _____ potential main effects.
 
  a. 2
  b. 3
  c. 4
  d. 24

Question 2

In a study examining the effects of gender (male or female) and major (psychology, computer science, philosophy, or biology) on college students' willingness to perform community service, what is the factorial notation?
 
  a. 2  2
  b. 2  3
  c. 2  4
  d. 1  6

Question 3

In a study examining the effects of gender (male or female) and major (psychology, computer science, philosophy, or biology) on college students' willingness to perform community service, how many interaction effects are possible?
 
  a. 1
  b. 2
  c. 6
  d. 5

Question 4

In a study examining the effects of gender (male or female) and major (psychology, computer science, philosophy, or biology) on college students' willingness to perform community service, how many main effects are possible?
 
  a. 3
  b. 6
  c. 5
  d. 2