### Sample Mean

**Definition: **
The *sample mean* of a set of
samples from a particular
realization of a *stationary stochastic process*
is defined
as the *average* of those samples:

(C.17) |

For a

*stationary stochastic process*, the sample mean is an

*unbiased estimator*of the mean,

*i.e.*,

(C.18) |

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