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It is 5+7+12 = 24/3 = 8 which is the mean average
(7-5) * 3 + 8 2 * 3 + 8 6 + 8 ■
The arithmetic mean of a set of numbers is found by dividing the sum of all the numbers by how many numbers there are. In this case the arithmetic mean is: (8 + 7 + 7 + 5 + 3 + 2 + 2) / 7 ---> because there are 7 pieces of data. = 34 / 7 = 4.857 ( to 3 d.p.)
what is the median of these numbers 5 6 6 7 8 9 9 0 2 3 5 6 8 8 8 8 0 1 2 3 5 5 6 7 7 8 0 2 4 5 7 8
If you mean points of (5, 1) and (2, -7) then the slope works out as 8/3