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44. A park ranger measures the height of pine trees in meters and counts the number of unbroken pine cones under the tree after

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44. A park ranger measures the height of pine trees in meters and counts the number of unbroken pine cones under the tree after a storm. He assumes that height is the explanatory variable. His data expressed as ordered pairs is (20, 6), (10, 7), (30, 4), (30, 5) and (10, 8). What is the correlation coefficient for this data? Show all formulas used and all work.

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