Value of the distribution of the 1st quartile
The function \(LQuart\) returns the value of the distribution of the 1st quartile (lower level) of a sorted list.
Quartiles divide the underlying distribution into four quarters. LQuart returns the value at the position \(Q1\) of a sorted list.
LQuart (List)
a=[3,6,7,8,8,10,13,15,16,20]
LQuart(a)= 7
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