GRAPHIC METHOD

When this method is used the individual values of the two variables are plotted on the graph paper. We thus obtain two curves, one for X variable and another for Y variable. By examining the direction and closeness of two curves so drawn we can infer whether or not the variables are related. If both the curves drawn on the graph are moving in the same direction (either upward or downward) correlation is said to be positive. On the other hand, if the curves are moving in the opposite direction, correlation is said to be negative.

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