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What is Understanding Standard Deviation & Variance about?
The document discusses measures of dispersion such as standard deviation and variance. It defines standard deviation as the positive square root of the mean of the square deviations from the arithmetic mean of the data. It notes standard deviation is based on all observations but gives more weight to extreme items. Methods for calculating standard deviation include the actual mean method for ungrouped and grouped data, as well as the step deviation method. Variance is defined as the square of the standard d
- Author
- Exemplar India
- Language
- EN