A previous student of this class was curious about the relationship between number of hours a person slept before an and the number of correct answers on the exam. She asked a sample of 5 people from her residence hall the number o hours they slept before their first exam and the number of correct answers they got on their first exam. The data are: Number of hours slept Number of correct before exam: X answers on exam: Y XY X2 Y2 8. 3. 10 9. 9. 7 Compute the Pearson's r correlation. SP Ex} r = SP = Σχ - SS XSSY SS = n

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