33. A study explored the risk of hearing loss in students listening to potential

Question

33. A study explored the risk of hearing loss in students listening to potentially hazardous music volumes on earphones. The authors concluded: "Compared with adolescents not exposed to potentially hazardous music volumes, those exposed had a higher proportion of having experienced hearing-related symptoms after listening to music through earphones." What is the explanatory variable? A. The proportion of students who listen to potentially hazardous music volumes B. Type of earphones used C. Hearing status (either hearing-related symptom present or absent) D. Hazardous music exposure volume (either exposed or not exposed)

Explanation / Answer

D. Hazardous music exposure volume (either exposed or not exposed)

The variable that causes the change in response variable is called the explanatory variable. Here, the changes in hearing related systems happen because of the exposure volume. So, exposure variable is the explanatory variable.

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