Physics · Statistical Communication
Which of the following is true for a first-order stationary random process X(t)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The mean of X(t) varies linearly, while its variance remains constant over time.
- 2The mean and variance of X(t) vary periodically with time.
- 3The mean of X(t) is constant, but the autocorrelation must be a function of absolute time.
- 4The mean of X(t) must be constant over time.✓
Correct answer
The mean of X(t) must be constant over time.
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