Whether the participants are smokers, and thus tolerant to the effects of nicotine, is an important extraneous variable. Dr. Benning could control for this variable by
a) using only non-smokers.
b) making smoking status another independent variable.
c) matching the participants in the groups on their smoking frequency distribution.
d) all of the above
D
Political Science
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Positive activities of interest groups include all but which of the following?
a. Providing information to public officials b. Educating members of interest groups c. Mobilizing interest group members in constitutionally approved ways d. "Astroturf" campaigning for desired goals e. Lobbying government officials
Political Science
A _____ is used to illustrate a five point summary.
a. memo b. frequency table c. contingency table d. box and whiskers plot
Political Science