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A random process is called as stationary in strict sense if

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A random process is called as stationary in strict sense if

(a) Its statistics vary with shift in time origin

(b) Its statistics does not vary with shift in time origin

(c) Its autocorrelation vary with shift in time

(d) Its autocorrelation does not vary with shift in time

I have been asked this question by my school teacher while I was bunking the class.

This interesting question is from Random Signals in division Signals and Spectra of Digital Communications

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The correct choice is (a) Its statistics vary with shift in time origin

For explanation I would say: A random process is defined to be stationary in a strict sense if its statistics varies with a shift in time origin.

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