_____, an important ecological process involved in the concentric zone theory, is the process by which a new category of people or type of land use arrives in an area previously occupied by another group or land use
a. Invasion
b. Gentrification
c. Succession
d. Diffusion
a
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Under which of the following conditions can an incomplete factorial design serve as a control group?
a. External validation is in jeopardy. b. There are fewer subjects in the control group than any treatment group. c. There are more control group subjects than treatment group subjects. d. A status-quo group is needed.
When a distribution is positively skewed, the ______ will be greater than the _______.
mean, median mode, median mean, variance mode, median none of the above
Which type of authority do revolutionists usually use to gather support for the revolution?
legal-rational authority c. charismatic authority d. coercion
The experimental and control groups should be comparable on: a. variables that are likely to be related to the independent variable under study
b. variables that are likely to be related to the dependent variable under study. c. age, education, and ethnicity. d. all demographic variables. e. all of these choices.