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Showing Revision 1 created 02/09/2013 by 龙 赵.

  1. 对一个以70英尺为均值
  2. 以25为方差的总体中,
  3. 如果我们换用厘米作单位,相应的均值和方差将会变成什么?
  4. 提示一下,1英尺是2.54厘米。