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**ST1**(//dataset//,//hypothesizedmean//)

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| **ST1** | Returns the Student's t value for a given data set and hypothesized mean value. |
| //Dataset// | The label of a QUEUE with its first component field defined as a REAL. |
| //Hypothesizedmean// | A numeric constant or variable representing a hypothesized mean value associated with the statistical test. |

**ST1 **computes the Student's t value for a given data set and hypothesized mean value. The function operates on the numeric set defined by all the entries in the first component of the designated QUEUE (//dataset//). The returned t value is used in a statistical test of an hypothesis about a normally distributed population based on a small sample.

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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:**

**StatSetXY  QUEUE,PRE()**

**X           REAL**

**           END**

**TValue     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**

** TValue = ST1(StatSetX,HypothesizedMean) !call ST1**