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Benford's law, also called the first-digit law, states that in lists of
numbers from many (but not all) real-life sources of data, the leading digit
is distributed in a specific, non-uniform way. According to this law, the
first digit is 1 about 30% of the time, and larger digits occur as the
leading digit with lower and lower frequency, to the point where 9 as a
first digit occurs less than 5% of the time. This distribution of first
digits is the same as the widths of gridlines on the logarithmic scale.
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