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18. Six students provided the length of time they studied for a sociology exam and the grade they received. Round answers to four decimal places.

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18. Six students provided the length of time they studied for a sociology exam and the grade they received. Round answers to four decimal places. Time studied 20 40 50 60 80 100 (minutes) Grade received 40 45 70 76 92 95 (percent) A) Determine the correlation coefficient between the time studied and the grade received. B) Determine whether a correlation exists at a = 0.01

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