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Author Question: In time-series designs, comparison groups A) are not possible to include. B) are helpful. C) ... (Read 13 times)

storky111

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on: Aug 4, 2018
In time-series designs, comparison groups
 
  A) are not possible to include.
  B) are helpful.
  C) always include random assignment.
  D) cannot exceed two groups.

Question 2

By adding comparison groups in a study of the effects of child seat belt legislation in California, Guerin and MacKinnon (1985) were able to
 
  A) perform more high-powered statistical procedures.
  B) attenuate the reliability of their observations.
  C) study the effects of other types of legislation on their target group.
  D) increase confidence in their conclusions.


Rilsmarie951

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Reply #1 on: Aug 4, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: D


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