[Click on image for larger view.] Figure 2: Naive Modify Predict Function vs. Using a Quantile Loss Function The ideas are illustrated by the graph in Figure 2. The hypothetical graph shows a linear ...

value the upper quartile is the median of the upper half ... To find these from the graph we draw two lines across from the vertical axis, one at 10 and one at 30. We read the values for the ...

There are 40 babies in the table, so to find the lower quartile, find ¼ of 40, which is the 10th value. Reading from the graph, the lower quartile is 38. To find the upper quartile, find ¾ of 40 ...