For the ordered data 3, 5, 7, 9, 11, 13, 15 and 17, what is the interquartile range?
Correct answer: B. 8
- A. 6
- B. 8
- C. 10
- D. 12
Explanation
The lower half is 3, 5, 7 and 9, whose median is 6, so Q1 equals 6. The upper half has median 14, so Q3 equals 14 and the interquartile range is 14 − 6 = 8.
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