View Median Iqr PNG. Also examined is tukey's five number summary. Median and interquartile range provides a powerful tool for detecting outliers that can be used instead of mean and standard.
It is used in statistical analysis to help draw conclusions about a set the iqr is often preferred over the range because it excludes most outliers.
The middle one is the median, also called the second quartile, q2. So we need a different approach. Then simply use mean=median and sd = iqr/1.35. Determining the median, q1, q3 and the iqr for a data set.