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2 năm trước
Điểm kiểm tra một tiết môn toán của một lớp 7 được ghi lại trong bảng sau: 6 5 4 7 7 6 8 5 8 3 8 2 4 6 5 8 2 7 4 6 5 8 9 10 7 3 5 9 8 9 10 8 6 1) Tìm tổng các tần số của dấu hiệu ? 2) Hãy cho biết Số các giá trị khác nhau của dấu hiệu ? 3) Tần số cua diem 6 là bao nhiêu?: 4) Mốt cua dấu hiệu là?
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