20
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3 + 11 + 11 + 11 + 12 + 13 + 15 + 15 + 16 + 17 + 19 = 143
The composite numbers between 11 and 19 are: 12 14 15 16 18 The other numbers, 11, 13, 17, and 19, are all prime.
[ 18 ] [ 11 ] [ 16 ] [ 13 ] [ 15 ] [ 17 ] [ 14 ] [ 19 ] [ 12 ]
Mean: 17 Median: 19 Mode: 20
Points: (-11, -17) and (-14, -19) Slope: 2/3