The point-biserial correlation coefficient is a measure of the direction and strength of the linear relationship between two variables, where ______.
A. one is continuous, and one is dichotomous
B. both variables are on an ordinal scale
C. one is at interval level or higher and one is ordinal
D. both variables are on a nominal scale
Ans: A
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An analysis of studies on children in joint physical or legal custody showed that these children were
a. ?more poorly adjusted than children in sole-custody settings. b. ?better adjusted than children in sole-custody settings. c. ?similar in terms of adjustment. d. ?none of these; joint custody no longer exists in the United States.
Estimating or checking your answer to a problem is most likely to occur with a problem that is
a. ill structured. b. well structured. c. well represented. d. unstructured.
All of the following procedures should be followed if a student has a seizure in school EXCEPT
A) move child onto their side. B) inserting an object between the teeth. C) loosening clothing. D) putting something flat and soft under the head.
. A population can be ______ group of interest to a researcher.
A. any B. only one C. only a small D. only a large