To conclude that Variable A is a cause of Variable B, you need to ...

[yoroshambo]

To conclude that Variable A is a cause of Variable B, you need to establish
 
  a. a statistical relationship between A and B.
  b. that Measure A occurred before Measure B.
  c. that other factors did not determine B.
  d. All of these are true.
  e. None of these are true.

Question 2

A researcher investigating the effect of a new drug administers a placebo to the control group in order to
 
  a. eliminate the Hawthorne effect.
  b. provide better matching of subjects in the experimental and control groups.
  c. minimize the experimenter effect.
  d. separate the psychological aspects of the treatment from other effects.

[tanna.moeller]

Answer to Question 1

D

Answer to Question 2

D

[yoroshambo]

Excellent

[adammoses97]

Gracias!