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Tổng số điểm 4 môn thi của các học sinh trong một phòng thi được cho trong bảng dưới đây. 32 |30 |22 |30 |30 |22 |31 |35 35 |19 |28 |22 |30 |39 |32 |30 30 |30 |31 |28 |35 |30 |22 |28 a.Dấu hiệu ở đay là gì? Có tất cả bao nhiêu giá trị? Số các giá trị khác nhau? b.Lập bảng tần số C.Tính số trung bình cộng Làm nhanh giùm mình nha vote 5sao Đừng spam
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