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Câu 6: Trong mô hình hồi quy tuyến tính đơn, để xét xem biến X có ảnh hưởng đến Y hay không,A. chúng ta chỉ sử dụng kiểm định tB. chúng ta chỉ sử dụng kiểm định F.C. chúng ta sử dụng kiểm định t hoặc F đều được.D. kiểm định F không sử dụng được.

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