The interquartile range is the difference between the:

A) largest and smallest numbers in the data set.
B) 25th percentile and the 75th percentile.
C) median and the mean.
D) None of these choices.

Interquartile Range

The difference between the 75th and 25th percentiles of a data set, representing the spread of the middle 50% of values.

25th Percentile

The value below which 25% of the observations in a group of data fall, commonly referred to as the first quartile.

75th Percentile

A value below which 75% of the data falls, often used in statistical analysis to measure data distribution.