# Correlation Coefficient

In statistics correlation techniques are used to determine whether a relationship exists between two variables in a bivariate data distribution. A scatter plot visually represents the relationship between the two variables. A scatter plot can show the direction of correlation that is whether a positive, negative or no correlation exists between the two variables. The scatter plot can also provide a hint on the strength of the correlation if it exists, like strong, moderate or weak . Correlation Coefficient a numerical measure of the strength of the relationship is calculated using different formulas.