Mathematics for IGCSE & O level - Statistical Diagrams (Section 1 - No. 43)
In a cumulative frequency diagram, how is the upper quartile found?
By finding the x-axis value corresponding to the 25th percentile.
By finding the x-axis value corresponding to the 75th percentile.
By finding the mean of the data.
By finding the median value.
Explication
The upper quartile is at the 75th percentile.