The obesity rates of elementary age children living in urban areas are compared to those living in rural areas to see whether children in urban settings have higher obesity rates.
A)Controlled experiment
B)Observational study

Question

Quizplus · Accepted Answer

This is an observational study because it involves observing and comparing existing conditions (obesity rates in urban vs. rural areas) without manipulating any variables.

The Obesity Rates of Elementary Age Children Living in Urban