13. The data processing system of claim 2 , wherein the sub-systems configured to accomplish determining a member-level demographic characteristic and determining a first demographic characteristic further comprise: a sub-system configured to accomplish assigning each member, of the first result-base, a value from a range of potential values; and a sub-system configured to accomplish summarizing the values assigned with a histogram.
13. The data processing system of claim 2 , wherein the sub-systems configured to accomplish determining a member-level demographic characteristic and determining a first demographic characteristic further comprise: a sub-system configured to accomplish assigning each member, of the first result-base, a value from a range of potential values; and a sub-system configured to accomplish summarizing the values assigned with a histogram. 14. The data processing system of claim 13 , wherein the range of potential values represents a demographic characteristic with two values.