A biologist is interested in the effects of cross-species interactions on aggression. He combines the results of many studies to determine an overall average effect size. What statistical procedure should he use?
A) Z test
B) t test
C) confidence intervals
D) meta-analysis
D
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What skews population projections?
a. Change in the rate of birth control usage b. Increase in the aging population of the United States c. Change in the rate of marriage d. Increase in the rate of divorce
Day laborers are those who ______.
A. refuse to work at night B. cannot work at night due to family obligations C. seek work on a day-to-day basis D. receive extra hardship compensation due to excessive sun exposure and cancer risk
If we were interested in how individuals' attitudes about smoking marijuana change from adolescence to adulthood, marriage and parenthood, the most appropriate study design would be
a. longitudinal. b. case study. c. cross-sectional. d. surveys. e. questionnaires.
Which of the following factors may encourage participants to participate in the research?
A. participants must be told the purpose of the project. B. participants must be warned about potential risks or harm. C. participants must be told whether they are free to discontinue participation at any time without penalty. D. All of these