Calculate the average (mean) value of a set of numbers. Supports comma-separated or space-separated lists.
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The arithmetic mean (average) is calculated by dividing the sum of a list of numbers by the count of those numbers:
\[\text{Mean} = \frac{\sum_{i=1}^{n} x_i}{n}\]Where \(x_i\) represents each individual number, and \(n\) is the total count of numbers in the data set.