CORREL function

Returns the correlation coefficient for two arrays or ranges


 * CORREL(array1, array2)
 * Array1 - a cell range of values.
 * Array2 - a second cell range of values.
 * 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.