Which statement correctly identifies a similarity between a ...

[tichca]

Which statement correctly identifies a similarity between a correlational study and the differential research design?
 
  a. Both demonstrate differences among groups between groups.
 b. Both use one of the two variables to create groups of participants.
 c. Both involve two groups with one score for each participant.
 d. Both demonstrate the existence of a relationship between two variables.

Question 2

Although any continuous variable can be used as a covariate, a(n) _______________ is usually best.
 
  Fill in the blank(s) with correct word

[l.stuut]

Answer to Question 1

d

Answer to Question 2

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