# What defines a strong or weak correlation?

##### 1 Answer

Nov 8, 2015

The explanation is given below.

#### Explanation:

Correlation measures the cause and effect relationship that exists between two variables X and Y.

The possibilities are

As X increases, Y also increases (As X decrease, Y also decreases) - i.e. both variables move in the same direction.

X and Y move in opposite directions. I.e. When X increases, Y decreases and when X decreases, Y increases.

The movement in X or Y has no direct effect on the other variables - i.e. X and Y are independent.

When X and Y are independent, there is zero correlation.

Thus any value near zero, the correlation is weak, if at all.

As correlation increases , the correlation is stronger.