Based on the data shown below, calculate the correlation coefficient (rounded to three decimal places)  x y 4 26.06 5 24.92 6 21.78 7 21.04 8 19.7 9 17.66 10 18.12 11 15.58 12 15.44 13 13.8 14 10.06 15 10.52 16 7.18 17 4.64 18 3.5

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