Calculate standard deviation, variance, and means for population or sample sets.
Calculator Parameters
Enter details and click calculate to view the results instantly.
Calculation Examples
Scenario Inputs
Output Result
numbers : 2,4,4,4,5,5,7,9
Mean: 5, Sample SD: 2.138, Population SD: 2.0
About Standard Deviation Calculator
Standard Deviation & Variance Calculator. Calculate standard deviation, variance, and means for population or sample sets. Starlightopia provides this tool completely free and online, optimized for instant, accurate computations.
Technical Specifications
CategoryMath
Target ValueStatistical Deviation Summary
Inputs Required (1)
Comma Separated Values (text)
Frequently Asked Questions
What does standard deviation measure in statistics?
Standard deviation measures the spread or dispersion of a dataset relative to its statistical mean.
What is the difference between sample and population standard deviation?
Population standard deviation looks at the entire dataset, while sample standard deviation analyzes a subgroup and applies Bessel's correction (dividing by n-1 instead of n).
What does a low standard deviation value indicate?
A low standard deviation indicates that the data points sit closely clustered around the calculated mean.
How is statistical variance related to standard deviation?
Variance is the average of the squared differences from the mean, and standard deviation is the square root of that variance.
Why do financial analysts track investment standard deviation?
Analysts use standard deviation to measure market volatility and assess the investment risk of an asset.