Question: A random variable X is given by its distribution table: X |-2 |-1| 1|2 P |0.1|0.3|0.2|0.4 Find its variance and standard deviation.

A random variable X is given by its distribution table:

X |-2 |-1| 1|2

P |0.1|0.3|0.2|0.4

Find its variance and standard deviation.

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