In a box plot the first quartile is 12 and the third quartile is 20. What is the interquartile range?
Answer and explanation
Correct answer: B.
- Step 1: The interquartile range is . Step 2. . **Answer: . Why not the others:** 16 is the mean of the quartiles, 32 is their sum, and 4 is half of the range.
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