1 .		A researcher studied the predictors of dropout rate of urban school students over many years. He found that his set of predictor variables explained 89% of the variability in likelihood to quit school. In a study of 10,000 students in five rural school districts, the predictor variables accounted for only 45% of the variance. What is the most likely explanation for this finding? [Hint]   Validity of instruments   Attenuation   Sample size   Shrinkage
2 .		Which research method allows the researcher to reduce the number of variables studied? [Hint]   Factor analysis   Path analysis   Discriminant function analysis   Canonical correlation
3 .		Which of the following is NOT a prediction study? [Hint]   Canonical correlation   Path analysis   Discriminant function analysis   Factor analysis
4 .		Which of the following is to relationship studies as the coefficient of determination is to prediction studies? [Hint]   Common variance   Factor analysis   Canonical correlation   Pearson r