A cumulative frequency graph shows values. Which statement correctly gives the interquartile range?
Answer and explanation
Correct answer: C. The value at 60 minus the value at 20
- Step 1: The lower quartile is the value at the th position.
- Step 2: The upper quartile is the value at the th position.
- Step 3: The interquartile range is the upper quartile minus the lower quartile.
Answer
The value at 60 minus the value at 20.
Why not the others: The value at 80 minus the value at 0: This is the range, not the interquartile range. The value at 40: This is the median. The value at 60 plus the value at 20: The interquartile range is a difference, not a sum.
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