Hwk 3 - Fall 2010

Hwk 3 - Fall 2010 - Economics 230 Fall 2010 Homework - 3...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Economics 230 Homework - 3 Z.Mukherjee Fall 2010 1. The following equation was estimated by OLS, sat hsperc pa co 00148 . 0 0135 . 0 392 . 1 lg + = , 137 , 4 = n and 273 . 0 2 = R , where colgpa (college GPA) is measured on a four-point scale, hsperc is the percentile in the high school graduating class (defined so that, for example, hsperc = 5 means the top 5% of the class), and sat is the combined math and verbal scores on the student achievement test. (i) Why does it make sense for the coefficient on hsperc to be negative? (ii) What is the predicted college GPA when hsperc = 20 and sat = 1050? (iii) Suppose that two high school graduates, A and B, graduated in the same percentile from high school, but Student’s A’s SAT score was 140 points higher. What is the predicted difference in college GPA for these two students? Is that difference large? (iv) What does the R-square value tell us? 2. The following equation was estimated by OLS,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/30/2011 for the course ECON 230 taught by Professor Pm during the Spring '10 term at Conn College.

Page1 / 2

Hwk 3 - Fall 2010 - Economics 230 Fall 2010 Homework - 3...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online