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the first non-zero digit in a decimal fraction. It can appear before or after the decimal comma.
a measure of statistical distribution that represents the difference between the first and third...
a small group of people or items selected by researchers from within a larger population
the matching of elements of one set onto elements of another set according to a given rule.
(also called simple depreciation) decay where the amount of decrease remains constant over time...
a general change that you can see when examining data.