'Xy observations' diaporamas de présentation

X and Y are not perfectly correlated. However, there is on average a positive

X and Y are not perfectly correlated. However, there is on average a positive relationship between Y and X. Y. 0. X 1. X 2. X. We assume that expected conditional values of Y associated with alternative values of X fall on a line. Y. E(Y i /X i ) = ? 0 + ? 1 X i. Y 1. ? 1.

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