If groups are the same on the dependent variable at the start of ...

[K@]

If groups are the same on the dependent variable at the start of the study,
 
  A) they are said to be equivalent.
  B) the same type of conclusions can be drawn as if they were randomly assigned.
  C) they may still differ on variables that could be potentially confounding.
  D) Both A and B

Question 2

Why is it best when testing a causal hypothesis to compare groups that are randomly assigned?
 
  A) It is more likely that the groups are equivalent at the beginning of the study.
  B) Random assignment assures that the participants are unaware of what is being studied.
  C) Random assignment assures that the experimenter is blind to the condition of the participant.
  D) All of the above

[jrpg123456]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: A

[K@]

TYSM

[tandmlomax84]

Gracias!