4. A computer-readable storage device whose contents, if executed by a computing system, cause the computing system to explore information relating to a population by: displaying a graphical report reflecting information relating to the entire population; in conjunction with the graphical report, displaying a control enabling a user to select a named segment of the population among a plurality of named segments of the population; receiving input indicating that the user has operated the displayed control to select a named segment of the population; in response to receiving the input, displaying in place of the graphical report reflecting information relating to the entire population a graphical report reflecting information relating to only the selected named segment of the population; displaying a control enabling a user to select one of a plurality of report types; and receiving input indicating that the user has operated the displayed control to select a report type, and wherein the displayed graphical report reflecting information relating to the entire population is of the selected report type.
4. A computer-readable storage device whose contents, if executed by a computing system, cause the computing system to explore information relating to a population by: displaying a graphical report reflecting information relating to the entire population; in conjunction with the graphical report, displaying a control enabling a user to select a named segment of the population among a plurality of named segments of the population; receiving input indicating that the user has operated the displayed control to select a named segment of the population; in response to receiving the input, displaying in place of the graphical report reflecting information relating to the entire population a graphical report reflecting information relating to only the selected named segment of the population; displaying a control enabling a user to select one of a plurality of report types; and receiving input indicating that the user has operated the displayed control to select a report type, and wherein the displayed graphical report reflecting information relating to the entire population is of the selected report type. 6. The computer-readable storage device of claim 4 wherein the displayed control enables a user to select two or more named subsets of the population among the plurality of named subsets of the population, and wherein the received user input indicates that the user has operated the displayed control to select two or more named subsets of the population, and wherein the graphical report displayed in place of the graphical report reflecting information relating to the entire population reflects information relating to only the selected named subsets of the population.