Given the data set of students' scores: 7, 12, 19, 25, 34, 44, 48, find the range of the data and the median. Explain what these measures tell us about the distribution of the scores.
Answer
Range = 41, Median = 25
The correct answer is Range = 41, Median = 25 — Interpretation: The range of shows a wide spread of scores, while the median of indicates that half the students scored below and half scored above. This suggests a moderate central tendency with considerable variability.
Step-by-step solution
- Order the data in ascending order (already ordered).
- Find the minimum value: and the maximum value: .
- Calculate the range: .
- With numbers, the median is the value in the ordered list: .
- Interpretation: The range of shows a wide spread of scores, while the median of indicates that half the students scored below and half scored above. This suggests a moderate central tendency with considerable variability.
Common mistake: Not sorting the data before finding the median
Concept tested: Range and Median
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