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The correlation strength of the relationship is often interpreted depending on how close or distant the value is from 1.
A value of 1 means that there exists a perfect relationship between the two variables.
A value of 0 is means that there exists no relationship at all between the variables.
A value between 0.1 and 0.3 means that the existing relationship is very weak.
A value between 0.3 and 0.7 means that the relationship is moderate.
A value between 0.7 and 0.9 means that the relationship is strong. Between 0.9 and 1, the relationship is very strong. This information can be summarized using the table below
| Value | Size of Strength |
| 0.1 – 0.30 | Weak |
| 0.31 – 0.69 | Moderate |
| 0.7 – 0.99 | Strong |
| 1 | Perfect |
| 0 | Zero |
Once the correlation has been computed, it can either be positive or negative depending on the sign of the correlation coefficient. Moreover, it is important to note that the value of the correlation coefficient ranges between -1 and +1. The closer it is to either -1 or +1 the stronger the relationship.
