Mathematics for IGCSE & O level - Statistical Diagrams (Section 6 - No. 36)
How are the upper and lower quartiles related?
The upper quartile is double the lower quartile.
The lower quartile is double the upper quartile.
They define the middle 50% of the data.
They are always equal in value.
Explanation
Together, the upper and lower quartiles define the range of the central 50% of the data.
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