STDEV Google Sheet Formula

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STDEV Formula Syntax

=STDEV(A1:A5)

Example Use Case

Estimating sample standard deviation for statistical analysis

Understanding the STDEV Formula

The STDEV function in Excel calculates the standard deviation of a sample, measuring how spread out numbers are from their mean. It’s a key statistical tool for assessing variability—like test score consistency or sales fluctuations—assuming the data is a sample, not the full population.

STDEV(A1:A5) with 10, 20, 30, 40, 50 returns ~15.81, using the sample formula √(Σ(x - mean)² / (n-1)). It ignores text and blanks, focusing on numbers, making it ideal for sample-based analysis.

Why Use STDEV?

STDEV quantifies dispersion—think quality control or risk assessment. Its sample focus (n-1 denominator) adjusts for bias in small datasets, offering a reliable measure of spread for statistical inference.