Correlation

• Correlation is a statistical measure showing how two or more variables move in relation to each other.
• It helps determine the presence and strength of a linear relationship between variables.
• The Pearson correlation coefficient (r) is commonly used, ranging from -1 to 1.
• A positive correlation (0<r≤1) means that as one variable increases, so too does the other.
• A negative correlation (-1≤r<0) implies that as one variable increases, the other decreases.
• A correlation of 0 suggests no linear relationship between the variables.
• Correlation does not imply causation, other factors may contribute to the relationship or it may be coincidental.