ps2_solution

ps2_solution - Problem Set 2 Solution Question 1 points...

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Unformatted text preview: Problem Set 2 Solution Question 1 points HSGPA College GPA 1 a) Mean 3.7996 3.6124 1 b) Median 3.8250 3.7000 1 c) mode 3.7500 3.5000 1 d) std dev 0.5476 0.2760 2 e) corr coeff Question 2 points cov(y t ,x t ) var(x t ) 2 a) 0.0113 0.2998 0.0378 3.4687 1 b) gpa=3.4687 + 0.0378*hsgpa + u_hat alpha_hat means that the location of GPA score which is the mean of GPA conditional on high school GPA. 0.5 c) fitted value: gpa_hat = 3.4687 + 0.0378*hsgpa 1 d) residuals: resid = gpa - gpa_hat 0.5 e) 3.5942 0.0767 beta_hat means the scale or marginal effect of GPA w ith respect to high school GPA. In other words, it represents the amount of change in GPA corresponding to one unit change in high school GPA , holding others constant. Q3 1. Check your answers in question (1) in Stata? . sum hsgpa gpa, d HSGPA ------------------------------------------------------------- Percentiles Smallest 1% .97 .97 5% 3 2.5 10% 3.6 3 Obs 46 25% 3.75 3.5 Sum of Wgt. 46 (Median)50% 3.825 Mean 3.799565 Largest Std. Dev. .5475682 75% 4 4.2 90% 4.2 4.3 Variance .2998309 95% 4.3 4.35 Skewness -3.148193 99% 5.02 5.02 Kurtosis 17.64842 GPA ------------------------------------------------------------- Percentiles Smallest 1% 3 3 5% 3.12 3 10% 3.2 3.12 Obs 46 25% 3.4 3.2 Sum of Wgt. 46 Median 50%...
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This note was uploaded on 11/20/2011 for the course ECON 420 taught by Professor Silous during the Spring '11 term at Emory.

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ps2_solution - Problem Set 2 Solution Question 1 points...

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