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**SS**(//dataset //[,//meanofset//])

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| **SS** | Returns the sum of the squared differences between each data set value and the data set's mean. |
| //dataset// | The label of a QUEUE with its first component field defined as a REAL. |
| //meanofset// | A numeric constant or variable representing the average of the data set's values (optional). |

**SS **computes the sum of the squared differences between each data set value and the data set's mean. The function operates on the numeric set defined by all the entries in the first component of the designated QUEUE (//dataset//). The computation is a significant factor in several statistical formulas.

The optional parameter helps to optimize the function. If not provided, the mean value is computed internally by the function.

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The passed data set does not have to be sorted. The function copies the passed set. The passed data set is unchanged.

**Return DataType:**     REAL

**Example:**

**StatSetX  QUEUE,PRE()**

**X          REAL**

**          END**

**SumOFSquaresX   REAL**

**CODE **

** FREE(StatSetX)                     !free the QUEUE**

** CLEAR(STADAT:RECORD)               !clear the record buffer**

** STADAT:Id = STA:Id                 !prime the record buffer**

** STADAT:ItemNumber = 1**

** SET(STADAT:KeyIdItemNumber,STADAT:KeyIdItemNumber !position file pointer**

** LOOP                               !load the QUEUE**

**   NEXT(StatisticsData)             !read next record**

**   IF ERRORCODE() OR STADAT:Id NOT = STA:Id**

**     BREAK**

**   ELSE**

**     StatSetX:X = STADAT:X          !load the QUEUE buffer**

**     ADD(StatSetX)                  !add to the QUEUE**

**   END**

** END**

** SumOFSquaresX = SS(StatSetX)       !call SS**