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Câu 43: Để ước lượng hàm cầu cho một loại sản phẩm, theo đó, lượng cầu phụ thuộc tuyến tính vào giá sản phẩm, chúng ta nên1 điểmA. bỏ hệ số chặn trong mô hình hồi quy vì giả của sản phẩm không bao giờ bằng 0.B. sử dụng kiểm định một phía để xem xét ảnh hưởng của giả đến lượng cầu.C. sử dụng kiểm định hai phía để xem xét ảnh hưởng của giá đển lượng cầu.D. bỏ ỷ tưỏng giả xác định lượng cầu trừ khi hệ số góc ước lượng lớn hon tanpha/2(n-k)

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