The Excel DSTDEV function returns the standard deviation of sample data extracted from records that match the given criteria. If data represents the entire population, use the DSTDEVP function.

**Syntax**: =DSTDEV (database, field, criteria)

The DSTDEV function syntax has the following arguments:

**Database**Required. The range of cells that makes up the list or database. A database is a list of related data in which rows of related information are records, and columns of data are fields. The first row of the list contains labels for each column.**Field**Required. Indicates which column is used in the function. Enter the column label enclosed between double quotation marks, such as “Age” or “Yield,” or a number (without quotation marks) that represents the position of the column within the list: 1 for the first column, 2 for the second column, and so on.-
**Criteria**Required. The range of cells that contains the conditions that you specify. You can use any range for the criteria argument, as long as it includes at least one column label and at least one cell below the column label in which you specify a condition for the column.

**Example**: Let’s look at some Excel DSTDEV function examples and explore how to use the DSTDEV function as a worksheet function in Microsoft Excel:

**Example 1**:

In the example below, the Dstdev function is used to find the sample standard deviation of scores obtained in English, by male students. The criteria are specified in cells G1 – H2 and the Dstdev formula is shown in cell G3.

**Syntax**: =DSTDEV(A1:E13,”Score”,G1:H2)

**Result**:

The above Dstdev function calculates the sample standard deviation of the values in cells E6, E9 & E12, and therefore returns the value *10.1%*.

Based on the Excel spreadsheet above, the following DSTDEV examples would return:

**Example 2**:

In the example below, the Dstdev function is used to find the sample standard deviation for the Math scores obtained by students over 8 years of age.

**Syntax**: =DSTDEV(A1:E13,”Score”,G1:H2)

**Result**:

The above Dstdev function finds the sample standard deviation of the values in cells E2, E8 & E11 and so returns the value *18.9%*.

**Note**:

- DSTDEV is mean to calculate variance for a sample. If data represents the entire population, use the DSTDEVP function.
- DSTDEV supports wildcards in criteria.
- Criteria can include more than one row (as explained above).
- The
**field**argument can be supplied as a name in double quotes (“”) or as a number representing field index. - The
**database**and**criteria**ranges must include matching headers.