Standard Deviation Calculator
Calculate the standard deviation and variance of a data set.
Frequently Asked Questions
What is standard deviation?
Standard deviation is a statistical measure that shows how far data deviates from the mean.
What is the difference between population and sample standard deviation?
Population divides by N, sample divides by N-1. Sample standard deviation is larger.
What is variance?
Variance is the square of the standard deviation. It measures the spread of data.
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