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# Use the [[median]] to divide the ordered data set into two halves.
#* If there is an odd number of data points in the original ordered data set, '''do not include''' the median (the central value in the ordered list) in either half.
#* If there is an
# 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.
This rule is employed by the [[TI-83]] calculator [[boxplot]] and "1-Var Stats" functions.
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