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three values used to divide a set of data into four groups of equal size; the second quartile is the median of the data.
a value towards which a sequence or series tends; or a position towards which a line moves.
(also called theoretical probability) assumes that all outcomes in the sample space are equally...
a small group of people or items selected by researchers from within a larger population
a frequency distribution curve that is skewed either to the left or the right, and is therefore...