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How to Calculate Standard Deviation In Excel


By gobrain

Jan 1st, 2024

The standard deviation is a commonly used statistical measure that quantifies the spread or variability of a data set. It is utilized across a variety of fields, including finance, engineering, and others.

On the other hand, Excel is a commonly utilized software for data analysis, making it crucial to know how to perform standard deviation calculation within the spreadsheet. So, we will examine the formula for standard deviation and then demonstrate its implementation in Excel.

Formula For Standard Deviation

Formula: SD = √(Σ(x - μ)^2 / n)

For:

  • x is a data in set,
  • μ is the mean,
  • n is the number of values in set,
  • Σ is the sum of

A Note: Population vs Sample in Standard Deviation

As it can be difficult to obtain data for the entire population, a sample is selected and the standard deviation is calculated, which requires a small change in the formula, as shown below:

SD = √(Σ(x - μ)^2 / (n-1))

Calculating of The Standard Deviation in Excel

In Microsoft Excel, you can use the STDEV.S(range) function to find the sample standard deviation of a data set.

Range represents the group of values for which you want to determine the standard deviation. For example, if your data is located in the range A1:A10, the formula to calculate the standard deviation will be:

=STDEV.S(A1:A10)

If you want to calculate standard deviation for a population, the formula will be:

=STDEV.P(range)

Conclusion

In this brief guide, we have demonstrated the formulas for population and sample standard deviation and how to calculate them using Microsoft Excel, a widely used spreadsheet for data analysis

Thank you for reading.