Refer to Exhibit 12-1. The size of a discussion group affects the quality of the discussions
a. necessarily ex post facto research
b. possible to do with experimental research
B
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Piaget identifies all of the following as characteristics of operations except they
a. are independent of perceptual cues. b. are irreversible. c. include a constant. d. include a transformation.
The authors appear to take the position that
A. the contemporary school reform movement has the capacity to address the basic causes of school failure in the United States. B. fundamental economic problems need to be addressed directly at their source through economic means rather than indirectly through educational means. C. the contemporary school reform movement is sufficiently independent of business control that it successfully puts the interests of children first. D. All these answers are correct.
Increasing numbers of U.S. children are likely to face the risks associated with unstable, inadequate housing, if not actual homelessness
a. True b. False
The covariance is
A. An unstandardized version of the correlation coefficient. B. A measure of the strength of relationship between two variables. C. Dependent on the units of measurement of the variables. D. All of the above.