The sampling distribution of the mean is
a. the population mean.
b. the distribution of the population mean over many populations.
c. the distribution of sample means over repeated samples.
d. the mean of the distribution of the sample.
C
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What type of research design is used when people of different ages are compared at the same point in time?
A. longitudinal B. sequential C. correlational D. cross-sectional
Seiko suffers from an eating disorder characterized by frequent binges. We can be reasonably certain that she
a. suffers from bulimia nervosa. b. suffers from either bulimia nervosa or anorexia nervosa of the binge-eating/purging type. c. also purges. d. does not purge.
Individuals who have alcohol problems tend to come from families with other individuals who have alcohol problems. This suggests that __________.
A. genetic factors cause an individual to have alcohol problems B. environmental factors cause an individual to have alcohol problems C. both genetic and environmental factors cause an individual to have alcohol problems D. although there is an association between genetics and alcoholism, no cause-effect relationship can be concluded.
Campbell proposed that women are more likely than men to use relational aggression because women
a. lack direct access to wealth. b. have lower levels of testosterone. c. place more of a value on their own lives and therefore avoid risky behaviors. d. do not want to risk physically harming the father of their offspring.