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The sample mean $\overline{X}_n$ is defined as the arithmetic average of $n$ observed values produced by repeating the experiment associated with a random variable. It is calculated by summing the individual observations and dividing by the total number of observations.

Conditions: There must be $n$ observations.; The observations are summed and divided by $n$.

The sample mean $\overline{X}_n$ is defined as the arithmetic average of $n$ observed values produced by repeating the experiment associated with a random variable. It is calculated by summing the individual observations and dividing by the total number of observations.

Conditions: There must be $n$ observations.; The observations are summed and divided by $n$.