#### Calculating Standard Deviation in Excel

Standard deviation is a statistical measure that helps you understand how spread out the data points in a dataset are. It quantifies the amount of variation or uncertainty in a set of values.

## Calculating standard deviation in Excel

Excel provides two functions for calculating standard deviation:

• STDEV.S: Calculates the standard deviation for a sample dataset.
• STDEV.P: Calculates the standard deviation for an entire population.

### Syntax:

STDEV.S(number1, [number2], …) STDEV.P(number1, [number2], …)

### Arguments:

• number1: Required. The first number in the range of data for which you want to calculate the standard deviation.
• number2, …: Optional. Additional numbers in the range of data for which you want to calculate the standard deviation.

### Example:

To calculate the standard deviation for the sample dataset in cells A1 to A10, you would use the following formula:

=STDEV.S(A1:A10)

To calculate the standard deviation for the population dataset in cells A1 to A10, you would use the following formula:

=STDEV.P(A1:A10)

## Interpreting standard deviation

The standard deviation is typically interpreted as follows:

• Low standard deviation: The data points are close to the mean, indicating that the data is relatively uniform.
• High standard deviation: The data points are spread out over a wide range, indicating that the data is more variable.

A high standard deviation indicates that the data is more variable, which can be useful for identifying outliers or anomalies. A low standard deviation indicates that the data is more uniform, which can be useful for making predictions.