Well, darling, the range of a set of numbers is simply the difference between the largest and smallest values. So, for the number 13, the range would be... drumroll please... zero! Because 13 is the only number in the set, so there's no range to speak of. Keep on crunching those numbers, honey!
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The range is 13
Range = Maximum - Minimum = 13 - 2 = 11
Range = Max(set) - Min(set) = 13 - 2 = 11
Range = 20. The range is the difference between the largest value and smallest value in a population, and it roughly shows dispersion. For this case, it is 13 - (-7) = 20. For small population sizes, the range is not a good statistic.
Range = highest number - lowest number = 61