How to Calculate Standard Deviation in Excel, and Why It Matters for Marketers
ExcelHow to Calculate Standard Deviation in Excel, and Why It Matters for Marketers
If you’ve ever taken a statistics class, the words ‘standard deviation’ might intimidate you. This complex formula provides insightful information for datasets that averages alone cannot reveal, and thankfully, Excel makes calculating this statistic easier than putting pencil to paper.
Standard deviation is frequently used by financial professionals as it can help determine risks in stock portfolios and is often applied to return on investment (ROI).
For marketing professionals, standard deviation can reveal variabilities and risks in datasets that will ultimately help guide campaign decisions.
What is standard deviation?
Simply put, standard deviation is a mathematical term that measures the variation in a set of values. In marketing, standard deviation can help account for widely varying costs or sales. If the numbers in a data set are spread far apart, they have a higher standard deviation.
This measurement can help assess risk when deciding how much budget can be allocated toward certain campaigns based on the standard deviation of the ROI, just to name one example.
How to Calculate Standard Deviation in Excel
There are six standard deviation formulas in Excel, which will be used based on whether you need to calculate sample standard deviation or population standard deviation. This is easy to identify in Excel, as the three formulas for population standard deviation include a P (.P, PA, or P at the end of STDEV).
STDEV.S
STDEVA
STDEV
STDEV.P, STDEVPA, STDEVP...
/