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Psychological Statistics (Spring 2021 - 31) Homework 9 (Chapter 15) - Problem 1 Pearson's r (Ch. 15) - Problem #1 Study Description Bellow are data from a correlational study exploring the relationship between hours spent studying and errors made on an exam. n = 5 students participated. For each participant, the number of hours spent studying for an exam, and the number of errors made on the exam are recorded below. Conduct a Pearson's r, with alpha set at 0.05 (two-tails), to determine if there is a relationship between hours spent studying and errors made on the exam. Table Person Hours (X) X2 Exam Errors (Y ) Y2 XY OAUIAN WUADO EX = EX' = EY = EY? = EXY = Scatter Plot 8 4 2 3 4 5 6 7 X Pearsons r . SP = EXY - EXEY n . SS. = EX? _ [XX) n . SS, = EY2 _ (CY)2 n VSS,SS. Critical Value of r . Critical Value (Table B.6 p. 709) df = n - 2 Conclusion