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Sample Problem: A study was conducted to determine the relationship of the scores of the students to the number of hours they spent studying. In preparing the scatter diagram, we will use the following data: STUDENT ID NUMBER HOURS SPENT STUDYING EXAM SCORES A1 90 A2 82 A3 2 62 A4 70 A5 94 A6 75 A7 92 A8 73 A9 88 A10 85 A11 60 A12 un 90 A13 W 70 A14 N 57 A15 1 45 Table 4. Hours spent studying vs. exam scores Source: from http://thequalityweb.com/scatter.htm