Interquartile Range

My Definition

Key Characteristics

The following are true of the interquartile range:

  • It represents the difference between the upper (or third) quartile and the lower (or first) quartile.

  • It is the range of values represented by the middle 50 percent of a data set.

  • It is also called the midspread.

  • The smaller the interquartile range, the tighter that the middle 50% of the data is clustered around the median.


Video Transcript (PDF)


The range is the difference between the maximum and minimum values of the data set.

overlapping figures

8 – 1 = 7
Range = 7

TEKS: 6(12)(C)