The Sequential Tests worksheet is created by testing each model term sequentially. The first model term is tested to determine whether it should enter the model. Then the second model term is tested to determine whether it should enter the model, given that the first term is in the model. Then the third model term is tested to determine whether it should enter the model, given that the first two terms are in the model. The model term tests continue until all model terms are exhausted.
The tests are computed using a QR factorization of the XY matrix. The QR factorization is segmented to match the number of columns that each model term contributes to the X matrix.
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