Problem-Solving and Data AnalysisEasy–MediumRange of a data set
Problem-Solving and Data Analysis practice question
The number of emails a worker received on each of nine days was 3, 5, 5, 6, 8, 8, 8, 9, and 12. What is the range of these numbers?
Answer: 9
Range = largest − smallest = 12 − 3 = 9.
Common wrong answers
- If you answered 8
- 8 is the median (and the mode), not the range.
- If you answered 12
- 12 is the maximum alone.
- If you answered 15
- 15 adds the extremes instead of subtracting.
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