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21. Nownes (2000) surveyed representatives of interest groups who were registered
as lobbyists of three U.S. state legislatures. One of the issues he studied was
whether interest groups are in competition with each other. Table 1–10 shows
the results for one such question. (a) Using this table as an example, explain the
idea of a frequency table to a person who has never had a course in statistics.
(b) Explain the general meaning of the pattern of results.