Measure of Dispersion | Range, Quartiles, Mean Deviation, Variance and Standard Deviation.
Range: Is the difference between the highest and the least values.
Quartiles divide a distribution in to four parts
Mean Deviation is the Arithmetic mean of all the absolute deviation from the mean.
The Variance is defined as: The average of the squared differences from the Mean. It is denoted by δ²
While Standard Deviation is the square root of Variance. It is denoted by δ
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