For each of the studies described below, choose the statistical technique that would be most appropriate. Be precise (i.e., there is only one correct answer for each scenario).
G. A developmental psychologist developed a theory that predicted the proportion of children who would, during a period of stress, cling to the mother, attack the mother, or attack a younger sibling. The situation was set up, and the responses of 50 children were recorded.
H. To evaluate if there is a difference in longevity based on location of residence (rural vs. urban), a researcher collected data on the age at death of identical twins, where one twin lived in a rural location and one lived in an urban location.
I. A researcher is interested in whether scores on a depression inventory collected following 6 weeks of therapy are different from the national mean depression inventory score.
J. In a study, a developmental psychologist tested the same children three times, at ages 10, 11, and 12. At each age, they worked on a set of 25 logic problems. The percentage correct on the test each year was compared to see if there was an age difference/developmental effect in logic ability.