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  3. The table above shows the frequency distribution of the heights of 80 students. What is the least possible range of the heights

The table above shows the frequency distribution of the heights of 80 students. What is the least possible range of the heights

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问题
The table above shows the frequency distribution of the heights of 80 students. What is the least possible range of the heights of the 80 students?
选项 A、15
B、16
C、20
D、24
E、28
答案B
解析 Recall that the range of the numbers in a group of data is the greatest number in the group minus the least number in the group. The table shows that the minimum height of the 80 students can vary from 140 to 144 centimeters, and the maximum height can vary from 160 to 164 centimeters. Thus the least possible range of the heights is 160 - 144, or 16 centimeters. The correct answer is Choice B.
This explanation uses the following strategy.
Strategy 4: Translate from a Figure to an Arithmetic or Algebraic Representation
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