• 2022-05-27
    样本:7,12,11,10,13,8,7,14,9,10,8,11,10,8,10,9,12,9,13,11。那么这组数据落在范围8.5~11.5内的频率应该是( )
    A: 0.65
    B: 0.6
    C: 0.5
    D: 0.4
  • 举一反三