An academic advisor wants to predict the typical starting salary of a graduate at a top business school using the GMAT Score of the school as a predictor variable. A simple linear régression of SALARY versus GMAT using 25 data points is shown below. FO= -92040 $1 = 228 s = 3213 r2 = .66r = .81 df = 23 t = 6.67 %3D Give a practical interpretation of r2 = .66. %3D O We expect to predict SALARY to within 2 N.66 of its true value using GMAT in a straight-line model. We can predict SALARY correctly 66% of the time using GMAT in a straight-line model. O 66% of the sample variation in SALARY can be explained by using GMAT in a straight-line model. We estimate SALARY to increase $.66 for every 1-point increase in GMAT.

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An academic advisor wants to predict the typical starting salary of a graduate at a top business
school using the GMAT Score of the school as a predictor variable. A simple linear regression of
SALARY versus GMAT using 25 data points is shown below.
20= -92040 51= 228 s = 3213 r2 = .66 r = .81 df = 23 t = 6.67
%3D
%3D
Give a practical interpretation of r2 = .66.
%3D
We expect to predict SALARY to within 2 W 66] of its true value using GMAT in a straight-line model.
O We can predict SALARY correctly 66% of the time using GMAT in a straight-line model.
5 66% of the sample variation in SALARY can be explained by using GMAT in a straight-line model.
We estimate SALARY to increase $.66 for every 1-point increase in GMAT.
Transcribed Image Text:An academic advisor wants to predict the typical starting salary of a graduate at a top business school using the GMAT Score of the school as a predictor variable. A simple linear regression of SALARY versus GMAT using 25 data points is shown below. 20= -92040 51= 228 s = 3213 r2 = .66 r = .81 df = 23 t = 6.67 %3D %3D Give a practical interpretation of r2 = .66. %3D We expect to predict SALARY to within 2 W 66] of its true value using GMAT in a straight-line model. O We can predict SALARY correctly 66% of the time using GMAT in a straight-line model. 5 66% of the sample variation in SALARY can be explained by using GMAT in a straight-line model. We estimate SALARY to increase $.66 for every 1-point increase in GMAT.
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