Editing Quartile (section)

==== Method 2 ====

# Use the median to divide the ordered data set into two halves. The median becomes the second quartile.
#* If there are an odd number of data points in the original ordered data set, '''include''' the median (the central value in the ordered list) in both halves.
#* If there are an even number of data points in the original ordered data set, split this data set exactly in half.
# The lower quartile value is the median of the lower half of the data. The upper quartile value is the median of the upper half of the data.
The values found by this method are also known as "[[John Tukey|Tukey]]'s hinges";<ref>{{Cite book|isbn=978-0-201-07616-5|title=Exploratory Data Analysis|last1=Tukey|first1=John Wilder|author-link=John Tukey|date=1977|publisher=Addison-Wesley Publishing Company |url-access=registration|url=https://archive.org/details/exploratorydataa00tuke_0}}</ref> see also [[midhinge]].