Ruby graphs scores from variables to test for a pattern. What type of statistical concept is she using?
A. ANOVA
B. scatterplot
C. correlation coefficient
D. t-test
Answer: B
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The extent to which tests or test items sample what they are supposed to measure is related to the measure's _______ validity
a. content b. construct c. criterion d. concurrent
Answer the following statements true (T) or false (F)
1 The matched samples technique eliminates the third-variable problem associated with correlational research 2 The third-variable problem means that the possibility of a third, causal variable is always present in correlational measurements 3 To conduct a true experiment, a variable must be manipulated by the experimenter 4 Identifying a group of children who watch violent television and a group of children who do not is an example of manipulating exposure to violent television 5 The variable that is manipulated in an experiment is the independent variable
Some believe that the American generation that fought World War II was superior to other generations in courage, persistence, and devotion to ideals. This generational difference illustrates a(n) ____ effect
a. structured observational b. ethnographic c. case study d. cohort
Etiology refers to the factors that cause or contribute to the development of psychological and medical problems
a. true b. false