Which of the following is an example of positive correlation?
a. the age of a child and the height of that child
b. the number of students in a school and the number of stores nearby
c. the temperature outside and the number of layers of clothing
d. the age of pets in a home and the number of pets in that home
The correct answer is (a) the age of a child and the height of that child.
In a positive correlation, if one quantity increases then other one also increases. Or they both can decrease at the same time. The height of a child is in positive correlation with age of that child.
All other answers either have no correlation or negative correlation.
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