21. The last snowstorm lasted 6 hours. Over that time, the amount of snowfall was measure hourly, except for at the 5th hour when Mr. Pearce watched the 3rd period of the Leaf game. Calculate the correlation coefficient, r, using the given formula. Time (Hours) Total Accumulation (cm) x2 ху _y² 8 3 10 4 12 16 7 18 Σχ Ey = Σχ? Σχy Ey² = ||

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