Scatter Diagrams Correlation Classifications
Chapter 5 # 6 Linear Correlation • Negatively correlated variables vary as opposites • As the value of one variable increases the other decreases 0 10 20 30 40 4 3 2 Regression Plot Hours Worked Student GPA Chapter 5 # 7 Strength of Correlation • Correlation may be strong, moderate, or weak. • You can estimate the strength be observing the
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www.stat.colostate.eduRegression Analysis: CourseGrade versus Problems The regression equation is CourseGrade = 44.8 + 0.355 Problems Predictor Coef SE Coef T P Constant 44.827 4.344 10.32 0.000 Problems 0.35519 0.05898 6.02 0.000 S = 2.346 R-Sq = 78.4% R-Sq(adj) = 76.2% Figure 1: Regression plot for the grade versus homework study ...
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