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σ
Standard Deviation Calculator
Calculate mean, variance, and either sample or population standard deviation from pasted numbers.
Population standard deviation
2Count8
Mean5
Variance4
About this tool
How it works
Sums squared distances from the mean and divides by n for a population or n−1 for a sample.
A practical way to use it
Compare how tightly two batches of measurements cluster around their means.
Use results as a practical aid, and verify important decisions against your own source data and qualified guidance.