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The mean is the average = (6+9+101+4)/4 = 30
8. In order: 4, 6, 7, 9, 10, 12 6 data items so median is mean of middle two: median = (7+9)/2 = 8.
4, 6, 8, 9, 10
The answer is 7.1 2+3+4+5+6+7+8+9+9+17/10=7.1