The distribution chart shows on the x-axis a measure. The measure values are bucketized in intervals. The current description is 1-2, 2-3, 3-4, etc. The intervals include the value on the lower border and exclude the limit on the upper border. [1,2[, [2,3[.
The distribution chart should have an visualization option that shows these intervals (instead of the short form). The visulaization should be consistent with the one used in the selection panel.