# Sterr - script function
Sterr() returns the aggregated standard error (stdev/sqrt(n)) for a series of values represented by the expression iterated over a number of records as defined by a group by clause.
Syntax:
Sterr ([distinct] expr)
Return data type: numeric
Arguments:
Sterr arguments
| Argument | Description |
| --- | --- |
| expr | The expression or field containing the data to be measured. |
| distinct | If the word distinct
occurs before the expression, all duplicates will be disregarded. |
Limitations:
Text values, NULL values and missing values are disregarded.
Examples and results:
Add the example script to your document and run it. Then add, at least, the fields listed in the results column to a sheet in your document to see the result.
Examples and results
| Example | Result |
| --- | --- |
| `Table1:`
`crosstable LOAD recno() as ID, * inline [`
`Observation\|Comparison`
`35\|2`
`40\|27`
`12\|38`
`15\|31`
`21\|1`
`14\|19`
`46\|1`
`10\|34`
`28\|3`
`48\|1`
`16\|2`
`30\|3`
`32\|2`
`48\|1`
`31\|2`
`22\|1`
`12\|3`
`39\|29`
`19\|37`
`25\|2 ] (delimiter is '\|');` `Sterr1:``LOAD Type,`` Sterr(Value) as MySterr ``Resident Table1 Group By Type;` | In a table with the dimensions `Type` and `MySterr`, the results of the Sterr() calculation in the load script are:
`Type MySterr`
`Comparison 3.2674431`
`Observation 2.7968733` |