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giahuytran605
2 năm trước
Điểm kiểm tra môn Toán học kì 1 của học sinh lớp 7A được giáo viên ghi lại trong bảng sau. Điểm số (x) 4 5 6 7 8 9 10 Tần số (n) 3 8 10 10 5 3 1 N= 40 Dấu hiệu ở đây là gì ? Lớp 7A có bao nhiêu bạn ? Tính điểm trung bình đạt được của học sinh lớp 7A (làm tròn đến chữ số thập phân thứ nhất). Tìm mốt của dấu hiệu ?
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