Which of the following observations is an example of a positive correlation?
A)When members of a population consume fewer fruits and vegetables,their risk of high blood pressure increases.
B)When a group of children increases their physical activity levels,the percentage of the children who contract cold infections decreases.
C)When women gain less weight than average during pregnancy,the birthweights of their babies tend to be lower than average.
D)When a population's intake of green tea increases,the percentage of lung cancer cases in that population decreases.

Question

Quizplus · Accepted Answer

A positive correlation occurs when two variables move in the same direction. In option C, as women gain less weight, the birthweights of their babies also tend to be lower, indicating both variables decrease together.

Which of the Following Observations Is an Example of a Positive