In practice, the quartiles are calculated as follows: calculate the median first, then the median of the data points below is the first quartile, and the median of the data points above is the third quartile.
The interval between the first quartile and the third quartile is called the interquartile range, or IQR for short. Sometimes, the difference between the first and third quartiles is also called the IQR. Like standard deviation, IQR is a measure of dispersion. However, IQR is a more robust statistic.
|Date of creation||2013-03-22 16:17:13|
|Last modified on||2013-03-22 16:17:13|
|Last modified by||CWoo (3771)|