Why is the old-age dependency ratio (OADR) rising and thus becoming a problem for certain countries?
What will be an ideal response?
Answer: The OADR is the ratio of people 65 years and older to those 20–64. If both numbers are approximately equal, younger individuals in the working age range can generate enough money to support the older group by paying taxes. In countries where there are lower birth rates and a rising population of elderly, there is an imbalance and consequently a crisis in how to pay for necessary services.
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Which of the following statements about the five-factor model is correct?
A. For it to gain acceptance, the model still needs more research that supports it. B. The model is well accepted because it has a wealth of research to support it. C. The model is merely conjecture and has not been subjected to any research. D. The model was once well accepted by scientists, but recent research has brought its accuracy into question.
A researcher uses an anonymous survey to investigate the television-viewing habits of American adolescents. Based on the set of 356 surveys that were completed and returned, the researcher finds that these students spend an average of 3.1 hours each day watching television. For this study, the set of 356 students who returned surveys is an example of a _______
a. parameter c. population b. statistic d. sample
Which of the following theorists proposed that learning occurs through observing other people?
A. Bandura B. Erikson C. Skinner D. Piaget
Which of the following describes the electrical impulse that provides the basis for the conduction of a neural impulse along an axon of a neuron?
A) An action potential B) The Moro reflex C) A resting potential D) The Babinski reflex