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Câu 7. Trong mô hình hồi quy bội, ước lượng hệ số chặn bằng 0 cho biết Y = B1 + B2XA. Đường hồi quy tổng thể sẽ đi qua gốc tọa độ.B. Đường hồi quy tổng thể không đi qua gốc tọa độ.C. Đường hồi quy mẫu sẽ đi qua gốc tọa độ.D. Đường hồi quy mẫu không đi qua gốc tọa độ.

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