Mathematics for IGCSE & O level - Statistical Diagrams (Section 4 - No. 15)
If the lower quartile is 10 and the upper quartile is 30, what is the interquartile range?
10
20
30
40
คำอธิบาย
The IQR is calculated as the difference between the upper quartile and the lower quartile: 30 - 10 = 20.