QUESTION 1 A social psychologist is interested in determining whether individuals who graduate from high school but get no further education earn more money than high school dropouts. A national survey is conducted in a large midwestern city, sampling 100 individuals from each category and asking each their annual salary. The results are tabulated, and mean salary values are calculated for each group. a. What is the independent variable in this study? b. What is the dependent variable? c. What level of measurement is the dependent variable? d. What is the sample? e. What is the population