## What is DSTDEV Function in Excel?

The **DSTDEV **function is one of the (**Database**) functions of Excel.

It estimates the **standard deviation** based on a sample from selected database entries.

We can find this function in the Database of the insert function Tab.

## How to use **DSTDEV **function in excel

**DSTDEV**

- Click on an
**empty**cell (like F5 )

2. Click on the **fx **icon (or press** shift+F3**)

3. In the **insert function tab** you will see all functions

4. Select **Database** category

5. Select **DSTDEV **function

6. Then select **ok**

7. In the function arguments Tab you will see **DSTDEV **function

8. In the **Database section** you can enter the range of cells that makes up the list or database. A database is a list of **related data** (ex: Table1)

9. **Field section** is either the label of the column in double quotation marks or a number that represents the **column’s position** in the list

10. **Criteria section** is the range of cells that contains the conditions you specify. The range includes a **column label and one cell below the label** for a condition (ex: Table1)

11. You will see the **result **in formula result section

## Examples DSTDEV function in excel

**Example1: **

### calculate **STDEV** of student height with DSTDEV function

**=DSTDEV(A5:D14,"Height",B1:D2)**----->>>>answer is 3.6

**Example 2:**

### calculate **STDEV** of student age with DSTDEV function

**=DSTDEV(A5:D14,"Age",C1:D2)**----->>>>answer is 3.26

**Example 3:**

### Python code for **DSTDEV** function

**DSTDEV**Name | Age | Height | Weight |

Olivia | 25 | 210 | 180 |

Noah | 25 | 205 | 235 |

Oliver | 27 | 195 | 205 |

Elijah | 22 | 198 | 185 |

James | 29 | 199 | 231 |

William | 29 | 201 | 240 |

Benjamin | 21 | 202 | 235 |

Lucas | 25 | 200 | 238 |

Henry | 22 | 204 | 190 |

```
import statistics
age=[25, 25, 27, 22, 29 ,29,21, 25 ,22]
stdev_age=statistics.stdev(age)
print(stdev_age)
```

## What is the purpose of **DSTDEV** function?

It estimates the **standard deviation** based on a sample from selected database entries.

## What is the Return value of **DSTDEV** function?

It just returns the number.

**DSTDEV** (database, field, criteria)=number

## How many arguments does **DSTDEV** function have?

DGET(database, field, criteria)

**DSTDEV** function has 3 arguments.

- In the
**Database section**you can enter the range of cells that make up the list or database **Field section**is either the label of the column in double quotation marks**Criteria section**is the range of cells that contains the conditions you specify

## Which version of excel supports DSTDEV function?

this function is available for all excel **versions **(2003-2019)

## Errors in DSTDEV function

If no record matches the criteria, DSTDEV returns the **#DIV/0!** error value.

If just one record matches the criteria, **DSTDEV ** returns the **#DIV/0!** error value.

**=DSTDEV(Table1[All],"Age",C1:D2)**----->>>>answer is **#DIV/0!**

## Conditions and criteria range in DSTDEV function

### Criteria argument in **DSTDEV ** function

we can define any range for the criteria argument: it has 2 condition

1. At leastone column label

2. At least one cell under the column label.

For example, if the range A1:A2 contains Name in A1 and Benjamin in A2,

you could define A1=”Name” & A2=”Benjamin”

Dget function find the word of “Benjamin” under “name” column

### location of Criteria range in DSTDEV function

Although the criteria range can be located anywhere on the worksheet, do not place the criteria range below the list. If you add more information to the list, the new information is added to the first row below the list. If the row below the list is not blank, Microsoft Excel cannot add the new information.

Make sure that the criteria range does not overlap the list.

To perform an operation on an entire column in a database, enter a blank line below the column labels in the criteria range.