Consider an experiment in which research participants were randomly assigned to one of three memory ...

Consider an experiment in which research participants were randomly assigned to one of three memory strategy training groups. After two weeks of training, participants were given a memory test. Analysis of variance indicated a significant effect of group. What further test would you perform?
 
  a. t-test
  b. a priori test
  c. post hoc test
  d. F test

Question 2

In a study with more than two levels of the independent variable, comparisons of pairs of means that are planned before the study is performed are called:
 
  a. post hoc tests.
  b. F tests.
  c. pretests.
  d. a priori tests.

Question 3

The null hypothesis for a three-level design would be:
 
  a. Group 1 > Group 2 > Group 3
  b. Group 1 < Group 2 < Group 3
  c. Group 1 = Group 2 = Group 3
  d. Group 1 ? Group 2 ? Group 3