When do we have a negative correlation?
A. when an increase in one variable is associated to a greater or lesser extent with an increase in the other
B. when an increase in one variable is associated to a greater or lesser extent with a decrease in the other.
C. when the two variables are not in matched at all, and there is no relationship between changes in one variable and changes in the other.
D. when a change in one variable is to a small extent matched by a change in the other.
Answer: B
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