# CORREL

Returns the correlation coefficient of the array1 and array2 cell ranges. Use the correlation coefficient to determine the relationship between two properties. For example, you can examine the relationship between a location's average temperature and the use of air conditioners.

**Syntax**

**CORREL**(**array1**,**array2**)

**Array1** is a cell range of values.

**Array2** is a second cell range of values.

**Remarks**

- The arguments must be numbers, or names, arrays, or references that contain numbers.
- If an array or reference argument contains text, logical values, or empty cells, those values are ignored; however, cells with the value zero are included.
- If array1 and array2 have a different number of data points, CORREL returns the #N/A error value.
- If either array1 or array2 is empty, or if s (the standard deviation) of their values equals zero, CORREL returns the #DIV/0! error value.
- The equation for the correlation coefficient is:
where:

and:

**Example**

`CORREL({3,2,4,5,6},{9,7,12,15,17})`

equals 0.997054