What is the standard deviation? And what is the difference to the variance? The standard deviation is a measure that indicates how much data scatter around the mean! The standard deviation is the quadratic mean of the distance from the mean. The variance now is the squared standard deviation.

► Online calculator Standard Deviation and Variance
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► Tutorial Standard Deviation and Variance
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► E-BOOK
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00:00 What is the standard deviation?
00:12 Standard deviation example
01:46 Equation standard deviation
02:51 Arithmetic Mean vs. Quadratic Mean
03:26 1/n vs 1/(n-1) Different equations for the standard deviation
04:42 Difference Standard Deviation and Variance

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