Variance Standard Deviation of Discrete Probability Distribution

In this class, We discuss Variance Standard Deviation of Discrete Probability Distribution.

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The reader should know the expected value of a random variable. Click Here.

At the begining of the probability course, we discussed variance and standard deviation.

Variance is used as a measure of dispersion.

The below diagram shows the derivation for variance.

Variance Standard Deviation of Discrete Probability Distribution1.1
Derivation