Lower Quartile Math Definition. The second quartile q2 is also the median. The values that divide a list of numbers into quarters.
The median divides a data set into two equal parts. Lower quartile the median of the data to the left of the median assuming the data are listed from least value to greatest value. The lower quartile or first quartile is denoted as q1 and is the middle number that falls between the smallest value of the dataset and the median.
Quartiles the quartiles are the three data values that divide an ordered data set into four groups where each group contains an equal number of data values.
Median of the upper half of the data. Median of the upper half of the data. The median divides a data set into two equal parts. The lower quartile or first quartile is denoted as q1 and is the middle number that falls between the smallest value of the dataset and the median.
