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
You might also like to view...
A characteristic of a population such as average income is referred to as a __________.
Fill in the blank(s) with the appropriate word(s).
Political Science
Since 1875, the only time Texans had an opportunity to vote on a new constitution was in _____
a. 1932 b. 1954 c. 1969 d. 1975 e. 1984
Political Science
Conservatives are typically more supportive of government activism in promoting social order than are liberals
Indicate whether this statement is true or false.
Political Science
Ideologically, Communists are considered a(n) __________ party
A) detrimental B) dangerous C) left-wing D) illegitimate
Political Science