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?? T?I: M?T S? PHUONG PH?P KI?M ??NH PHI THAM S?. TH?C HI?N : NH?M 4-QTKD-??M 1Truong Th?i DuongPh?m Van H?iNguy?n Th? Xu?n HuongNguy?n Van Nh?n ?inh ??c Th?chB?i Van Tu?nM? Van Tu?ng V? H? Kim Uy?n. ?? T?I: M?T S? PHUONG PH?P KI?M ??NH PHI THAM S?. CHUONG I : ki?m d?nh chi-square test
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