A random sample means that
a. each person in the population has an equal chance of being included in the study
b. people are assigned to conditions by random chance
c. participants have responded to an advertisement or request for participation
d. the sample is not representative
Question 2
In the last 20 years, social psychologists have improved the representativeness of their research samples in which of the following ways?
a. by including many more members of ethnic minority groups in their samples
b. by decreasing their reliance on older adults as research participants
c. by improving the gender balance of their samples
d. all of the above
The Dugong is an endangered species; the largest remaining population is found in Australian waters
Letter from a Person with Pure Alexia
Transmission of autosomal dominant disorders (50% chance for an affected child).
Population growth and growth rate, 1950 - 2100
Some Cases of Population Aging
Demographic transition model for changes in population growth rates and sizes, correlated with long-