mean: add, divide, times by frequency, use mid-point, includes all values, median: put in order, find the middle, if an even number in the list find the middle of the middle, ignores extreme values, mode: the most frequent, if there may be no correct answer, there can be more than 1 answer correct, must be one of the original values, range: subtract lowest from highest, a measure of consistency, a measure of spread,

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