Problem-Solving and Data AnalysisVery hardRange after raising the smallest value
Problem-Solving and Data Analysis practice question
A data set of 9 values has a range of 20. The smallest value is increased by 5, and it remains the smallest value. No other value changes. What is the range of the new data set?
Answer: 15
The largest value is unchanged and the smallest rose by 5, so the range shrinks from 20 to 15.
Common wrong answers
- If you answered 5
- 5 is the change, not the new range.
- If you answered 20
- 20 assumes the range is unchanged.
- If you answered 25
- 25 adds 5 to the range.
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