Question: For the model in Section 2.3.4 for the two-way layout, construct a full-rank model matrix. Show that the normal equations imply that the marginal row

For the model in Section 2.3.4 for the two-way layout, construct a full-rank model matrix. Show that the normal equations imply that the marginal row and column sample totals for y equal the row and column totals of the fitted values.

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