Why does it make sense for the coefficient on psperc to be negative? What is the predicted university GPA when psperc = 20 and sat = 1,050? %3D %3D

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
Problem 70E
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Why does it make sense for the coefficient on psperc to be negative?
What is the predicted university GPA when psperc = 20 and sat = 1,050?
%3D
Transcribed Image Text:Why does it make sense for the coefficient on psperc to be negative? What is the predicted university GPA when psperc = 20 and sat = 1,050? %3D
The following equation was estimated by OLS:
Unipa = 1.392 - 0.0135 psperc + 0..00148 sat
n = 4,137, R2 = 0.273
Where unipa is measured on a four-point scale, psperc is the percentile in the post-
sixteen class (defined so that, for example, psperc =5 means the top 5% of the
class), and sat is the combined maths and verbal scores on the student
achievement test.
Transcribed Image Text:The following equation was estimated by OLS: Unipa = 1.392 - 0.0135 psperc + 0..00148 sat n = 4,137, R2 = 0.273 Where unipa is measured on a four-point scale, psperc is the percentile in the post- sixteen class (defined so that, for example, psperc =5 means the top 5% of the class), and sat is the combined maths and verbal scores on the student achievement test.
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