When comparing two or more series of measurements, it is useful have a relative measure like the distribution of values.

The easilest way to build a distribution of a series of measurements $x_i = x_1, \dots, x_n$ is from a histogram. For each bucket $b$:

$D(b) = \frac{\sum_{i=1}^m d[i]}{n}$

where $n$ is the total number of values.

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