Question

Which of the following could not be an example of secondary data?

Information on attitudes about abortion among senior citizens collected via a short survey by the University of Michigan

Data on length of gestation among female monkeys from a sample of monkeys at zoos in the United States

Data on individuals' weight change among those given a placebo pill in a nationwide experiment

Information about the effects of heavy metal music on violent behaviors, based on the stories of three juvenile offenders in New York City.

Data on the behavioral