A two-factor study with two levels of factor A and three levels of factor B uses a separate group of ...

A two-factor study with two levels of factor A and three levels of factor B uses a separate group of n = 5 participants in each treatment condition. How many participants are needed for the entire study?
 
  a. 5 c. 25
  b. 10 d. 30

Question 2

In a two-factor analysis of variance, a main effect is defined as _____.
 
  a. the mean differences among the levels of one factor
  b. the mean differences among all treatment conditions
  c. the mean difference between the two factors
  d. the difference between the largest treatment mean and the smallest treatment mean

Question 3

A repeated-measures ANOVA produced an F-ratio of F = 4.00 with df = 1, 14 . If the same data were analyzed with a repeated-measures t test, what would be the df value for the t statistic?
 
  a. 1
  b. 14
  c. 15
  d. Cannot determine without more information