It's statistics: If you have a sorted list of numbers, the lower quartile is the number that is one quarter from the start of the list.
Or you can say that it's the number where one quarter of the entries in the list is smaller than or equal to that number.
Chat with our AI personalities
A lower quartile i s the mediaon of the lower half of a data set. A data set is divided up into different quartiles.
The upper quartile, for a set of ordinal observations, is a value such that a quarter of the observations have a greater value. Similarly, the lower quartile is a value such that a quarter of the observations have a smaller value.
Interquartile Range, or IQR
The lower quartile.
The lower quartile is the line that represents the left-hand edge of the "box", in the box and whisker plot.