One method people use, is to include the median in the calculation of both the upper and lower quartiles. The second way people calculate the upper and lower quartiles is to exclude the median from the calculation of both quartiles.
When finding Q1 and Q3 Do you include the median?
The first group of values contains the smallest number up to Q1; the second group includes Q1 to the median; the third set is the median to Q3; the fourth category comprises Q3 to the highest data point of the entire set.
When finding quartiles do you include the median?
- 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. ...
- The lower quartile value is the median of the lower half of the data.
