Using already existing groups for research implies that A) ...

[Yolanda]

Using already existing groups for research implies that
 
  A) participants cannot be randomly assigned.
  B) the research project is doomed to fail.
  C) any comparisons made between the groups are meaningless.
  D) participants have already been randomly assigned.

Question 2

Two basic quasi-experimental designs mentioned in the text are
 
  A) the nonequivalent control-group design and the differential design.
  B) the repeated-measures design and the nonequivalent control-group design.
  C) the interrupted time-series design and the case-study design.
  D) the nonequivalent control-group design and the interrupted time-series design.

[Jossy]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: D

[Yolanda]

Thanks

[Jossy]

Welcome