Question: A data set consists of n = n1 + n2 + n3 observations on y and x. For the first n1 observations, y = 1

A data set consists of n = n1 + n2 + n3 observations on y and x. For the first n1 observations, y = 1 and x = 1. For the next n2 observations, y = 0 and x = 1. For the last n3 observations, y = 0 and x = 0. Prove that neither (21-19) nor (21-21) has a solution.

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