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 Everyday Examples
 Interquartile Range:  The difference between the 25th and the 75th percentile in a data set.
The following shows test scores for five students.

52, 60, 68, 80, 82, 83, 85, 86, 86, 88, 92, 93, 94

85 is the median for the entire data set. 80 is the median of the lower half of the numbers, which is also known as the 25th percentile. 88 is the median of the uper half of the numbers, also known as the 75th percentile. The interquartile range is 88-80, which is 8. This means that between