Five-number summary and interquartile range

A five-number summary of the data set is:

1. the minimum value - 0th percentile

2. first quartile (Q1) - 25th percentile

3. median - 50th percentile

4. third quartile (Q3) - 75th percentile

5. the maximum value - 100th percentile

The interquartile range is found by subtracting the third quartile minus the first quartile:

IQR = Q3 - Q1