Definition
In a regression model, written in matrix-vector form as
the matrix X is the design matrix.
Read more about this topic: Design Matrix
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“Perhaps the best definition of progress would be the continuing efforts of men and women to narrow the gap between the convenience of the powers that be and the unwritten charter.”
—Nadine Gordimer (b. 1923)
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“Scientific method is the way to truth, but it affords, even in
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