Mathematics for IGCSE & O level - Statistical Diagrams (Section 6 - No. 13)
The interquartile range (IQR) is a measure of...
the spread of the middle 50% of the data.
the range of the entire data set.
the difference between the mean and the median.
the value at the 75th percentile.
Explanation
The IQR measures the spread of the central 50% of the data, from the lower to the upper quartile.
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