18. Which choice best describes the value of the estimate for E(y|x = 0)? (a) E(y|x = 0) 1.225 (b) E(ylx = 0) 5.151 = (c) (d) (e) E(y|x = 0) 1.300 = E(yx = 0) = -2.125 E(ulx = 0) = 4.849

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