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Which gives the measure of randomness of the random variable?

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Which gives the measure of randomness of the random variable?

(a) Mean

(b) Variance

(c) Standard variance

(d) Pdf

I got this question by my college director while I was bunking the class.

This intriguing question comes from Random Signals in division Signals and Spectra of Digital Communications

1 Answer

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Right answer is (b) Variance

The explanation: Variance gives the randomness of the random variable. It is the difference between the mean square value and square of the mean.

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