A researcher selects a sample of 24 participants and has them complete a survey on dating preferences. In this example, what are the degrees of freedom for sample variance and what does this represent?
A. df = 24; it represents the number of scores that are free to vary in a sample.
B. df = 23; it represents the number of scores that are free to vary in a sample.
C. df = 23; dividing SS by df makes the sample variance a biased estimator of the population variance.
D. df = 24; dividing SS by df makes the sample variance an unbiased estimator of the population variance.
Ans: B
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When teachers use a philosophy of mind-mindedness it means that they:
A) use their minds to plan a curriculum B) focus on cognitive skills that enhance brain development C) constantly focus on how they can better support brain development D) consider the perspective and feelings of the children
In an integrated curriculum focusing on young adolescents' personal and social concerns, the role of the school library media specialist includes:
a. allowing and encouraging teachers on the interdisciplinary team to work alone, since they are the curricular experts. b. working with the mathematics, science, social studies, and language arts teachers but not with the art, music, and vocational educational teachers since they are not content specialists. c. understanding young adolescents' development and their personal and social concerns as well as understanding of how these perspectives intersect with problems and the concerns of the larger world. d. working closely with administrators and curriculum specialists to be certain teachers are doing their jobs.
After the baseline data are stable, the _______________ would be that there would be no change in the data path for the dependent variables if there was no intervention effect.
A. covariance B. replication C. verification D. prediction
In stating the problem for a quantitative research study one should
a. restrict the scope of the study to a specific question. b. operationally define the variables under investigation. c. spell out all the steps needed for conducting the study. d. a and b. e. b and c.