Returns the sum of the sum of squares of corresponding values in two arrays. The sum of the sum of squares is a common term in many statistical calculations.
Syntax
SUMX2PY2(array_x,array_y)
Array_x is the first array or range of values.
Array_y is the second array or range of values.
Remarks
 The arguments should be either 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 array_x and array_y have a different number of values, SUMX2PY2 returns the #N/A error value.
 The equation for the sum of the sum of squares is:
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

A 
B 
First array 
Second array 
2 
6 
3 
5 
9 
11 
1 
7 
8 
5 
7 
4 
5 
4 
Formula 
Description (Result) 
=SUMX2PY2(A2:A8,B2:B8) 
Sum of the sum of squares of the two arrays above (521) 
=SUMX2PY2({2, 3, 9, 1, 8, 7, 5}, {6, 5, 11, 7, 5, 4, 4}) 
Sum of the sum of squares of the two arrays constants (521) 
