Table of Contents
This guide explains how to use STDEV Function in Excel, including its syntax, required arguments, practical examples, and common errors.
Description: The function helps estimate the standard deviation based on a sample, where the standard deviation is a measure of the dispersion of values compared to the average.
Syntax: STDEV (number1, [number2]. ) .
Inside:
- number1: The first argument in the form of a number corresponding to the value in the overall sample, is a required parameter.
- number2. : The second argument in the form of a number corresponding to the overall sample, is an optional parameter, the number of parameters from 2 to 255 parameters. Note if you use separate parameters you use commas to separate the number values.
--- -> You can replace individual values with a single array or refer to an array.
Attention:
- Calculation formula of STDEV function:
Inside:
+ x : is the average sample AVERAGE (number1, number2. ).
+ n : is the size of the sample.
- Where data represents the whole population => use STDEVP function to calculate standard deviation.
- Standard deviation calculation based on the method: " n-1 ".
- Value parameters can be numbers or names, arrays, or references that contain numeric values.
- The function counts arguments in the case of logical values and presents the number of textual forms directly typed into the list.
- If the parameter is an array or reference -> only numeric values in the array are counted, in addition, blank values, logical values, text. are ignored.
- The function will give an error in case the parameters are text or logical values cannot be converted to numeric types.
- In case you want logical values, text. are allowed to calculate -> use STDEVA function.
For example:
Calculate the standard deviation of the following 3 product samples:
In the cell to calculate enter the formula: = STDEV (C8: E8) to compare the durability of 3 products corresponding to the 1st value.
Press Enter to get the standard deviation result for the 3 products:
Copying the formula for the remaining values results in:
Estimate the standard deviation by 1 when the deviation between values is negligible -> the strength between the 3 products is equal.
The above is the usage and necessary notes when using the STDEV function. Hope to help you solve the problem effectively and quickly.
Good luck!
FAQ
What does the STDEV function do in Excel?
The STDEV function performs the calculation described in this guide. Use the correct arguments and compatible data types for reliable results.
How do I enter the STDEV function correctly?
Start with an equals sign, enter STDEV, add the required arguments inside parentheses, and confirm that cell references and separators are correct.
Why does the STDEV function return an error?
Common causes include missing arguments, invalid data types, incorrect cell references, unsupported values, or regional separator settings.
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