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Brief Answers to EvenNumbered Problems
CGKPLETE SOLUTIONS TO ALL PROBLEMS
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AIRCAP appropriate autocorrelation average better bias biased calculate centered chemical worker coefficient confidence interval confidence region constant coordinates correlation course covariance covariance matrix distribution drugs dummy dumy E(yt ellipse esti estimates the direct exactly example False Figure fitted follows Gauss-Markov theorem given graph hence increase interpolating less likelihood likelihood function linear model mators matrix multicollinearity multiple regression normal normal distributions notation null hypothesis observed obtain OLS estimator PASMOK percentage points population posterior Pr(z prediction prediction interval prior prob-value Problem 3-1 proof random ratio regression line regressors reject residual variance sample mean Similarly simple regression slope small sample solution solve standard error statistically substitute t-ratio Table VII Take logs tion unbiased uncorrelated unknown values variables variance s2 vectors x1 and x2 X2 score xY x2 zero