If you have conducted a study using the regression-discontinuity design, how would you tell if your treatment had an effect?
a. by looking at the data to see if the regression line of the posttest scores differs from the regression line of pretest scores.
b. by statistically analyzing the data using Analysis of Variance.
c. by comparing the pretest scores with the posttest scores to see if there was a significant change.
d. by determining if there is a discontinuity in the regression line for the people above and below the cutoff score.
D
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What doctrine guided U.S. foreign policy between 1947 and 1990?
a. isolationism b. globalism c. containment d. regionalism e. interdependence
Which of the following is true of the Defense of Marriage Act?
A) It allowed state governments to ignore same-sex marriages performed in other states. B) It stated that America's federal government should allow same-sex couples to get married. C) It allowed state governments to provide medical and social benefits to couples in same-sex marriages. D) It stated that the national government is required to accept state-authorized same-sex marriages. E) It stated that every state is required to treat a relationship between persons of the same sex as a marriage.