Some consideration in interpreting correlation

1. Correlation represents a linear relationship.

• Tells you how much two variables are linearly related.

2. Restricted range:

• Correlation can be deceiving if full information about each variable is not available.

3. Outliers:

• Describes strange outcomes.
• Eg: No heart beat lies between 60—100 bpm but a patient has 40 bpm. Then the doctor considers the heart beat as outlier.
• It is a data point that is an abnormal distance from the other values in a data set whose concept is in exact.