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题目材料:

If the range of the average daily electric use for the months from January to June in 2015 was x kilowatt-hours less than that for the months from July to December in 2015 and if the range of the average daily electric use for the months from January to June in 2016 was y kilowatt-hours less than that for the months from July to December in 2016, approximately what is the value of x-y?
  • A1
  • B11
  • C19
  • D28
  • E38

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5.2.5 极差 5.1.2 条形图

5.2.5 极差

5.1.2 条形图

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