# Calculate Correlation Co-efficient

### Using This Calculator

Use this calculator to determine the statistical strength of relationships between two sets of numbers. Click on the "Add More" link to add more numbers to the sample dataset. The co-efficient will range between -1 and +1 with positive correlations increasing the value & negative correlations decreasing the value. The results will automatically update each additional numbers are added to the set.

### Correlation Co-efficient Formula

Here is the correlation co-efficient formula used by this calculator

**Correlation(r) = NΣXY - (ΣX)(ΣY) / Sqrt([NΣX ^{2} - (ΣX)^{2}][NΣY2 - (ΣY)^{2}])**

Formula definitions

- N = number of values or elements in the set
- X = first score
- Y = second score
- ΣXY = sum of the product of both scores
- ΣX = sum of first scores
- ΣY = sum of second scores
- ΣX
^{2}= sum of squares of first set of scores - ΣY
^{2}= sum of squares of second set of scores

### Brian

This calculator does not attempt to account for Brian. :)