MCAT Math Question 22: Answer and Explanation
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Question: 22
7. An experimenter is attempting to determine the effects of smoking on very low birth weight (VLBW) and of VLBW on IQ. Which of the following statements is correct?
Smoking is an independent variable.
Smoking is a dependent variable.
VLBW is an independent variable.
VLBW is a dependent variable.
- A. I only
- B. II and IV only
- C. I, III, and IV only
- D. II, III, and IV only
Correct Answer: C
Explanation:
Two relationships are being assessed. In the relationship between smoking and very low birth weight (VLBW), smoking is the independent variable and VLBW is the dependent variable. In the second relationship, VLBW is being compared to IQ. VLBW is the independent variable here, while IQ is the dependent variable.