A true experiment allows the establishment of nonspuriousness through ______.
A. using two comparison groups
B. controlling when treatment occurs
C. random assignment into two or more comparison groups
D. documenting the conditions under which change occurs
C. random assignment into two or more comparison groups
Political Science
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A ____ tax is a tax levied on the removal of natural resources (especially oil and gas) from the earth
a. franchise b. property c. corporate income d. severance e. motor fuels
Political Science
A perfectly reliable measure
a. has a reliability of .00 b. has no measurement error c. is valid d. has as much true score variance as error variance e. has no variance
Political Science