1.

A stationary random process X(t) is applied to the input of a system for which h(t) = u(t) t^2 e^(-8t). If E[X(t)] = 2, the mean value of the system’s response Y(t)is(a) 1/128(b) 1/64(c) 3/128(d) 1/32I had been asked this question during a job interview.Query is from Random Process in division EDC Overview of Electronic Devices & Circuits

Answer» CORRECT option is (C) 3/128

Easiest explanation: The mean VALUE of Y(t) is integral of h(t)dt over NEGATIVE infinity to POSITIVE infinity which gives the value equal to 3/128.


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