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Power spectrum describes distribution of _________ under frequency domain.

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Power spectrum describes distribution of _________ under frequency domain.

(a) Mean

(b) Variance

(c) Gaussian

(d) None of the mentioned

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

I'd like to ask this question from Spectral Density and Autocorrelation in division Signals and Spectra of Digital Communications

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Best answer
Right answer is (b) Variance

The best explanation: Power spectrum gives the distribution of variance of a signal in the frequency domain, sampled into spectral components.

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