Psychology - Negative correlation
In contrast to a positive correlation, a indicates an relationship
between two variables. This means that a high score on variable X is
associated with a low score on variable Y, or a low score on variable X is
associated with a high score on variable Y. For example, one could predict
a negative correlation between the number of police patrolling the streets
and the rate of crime in that area. The dots on the scatter diagram would
still cluster together but would indicate that as one variable increases in
value the other variable decreases in value.
The correlation  method is useful to a researcher as it enables the
researcher to make predictions. It indicates if a relationship exists
between two variables and the strength of the relationship. However,
remember that the correlation method cannot demonstrate causation. The
researcher cannot assume that because two variables are related to one
another that one causes the other.
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