Which of the following observations is an example of a positive correlation?
A)When a group of 6-year-old children increase their physical activity level to 60 minutes a day,the children's muscle mass increases.
B)When teenage girls increase their intake of iron-rich foods,the percentage of the girls who have iron-deficiency decreases.
C)When older adults increase their daily intake of vitamin D,the percentage of the adults that develops infections decreases.
D)When a population consumes more fruits and vegetables,the percentage of people in that population with scurvy decreases.

Question

Quizplus · Accepted Answer

A positive correlation means that as one variable increases, the other variable also increases. In this scenario, as the physical activity level of the children increases, their muscle mass also increases, showing a positive correlation.

Which of the Following Observations Is an Example of a Positive