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Fig. 7.5 Final Spreadsheet for SAT vs. FROSH GPA Regression Analysis
7.3 Using the Regression Equation to Predict FROSH GPA
Objective : To find the predicted FROSH GPA using an SAT
Reading Score of 600, an SAT Writing Score of 500,
and an SAT Math Score of 550
Plugging these three numbers into our regression equation gives us:
Y
1.5363 + 0.0006 (600) + 0.0003 (500) + 0.0021 (550)
¼
Y
1.5363 + 0.36 + 0.15 + 1.155
¼
Y
3.20 (since GPA scores are typically measured in two decimals)
¼
If you want to learn more about the theory behind multiple regression, see Keller
(2009) and Gould et al. (2002).
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