Educational Statistics Anxiety and Performance To measure the relationship between anxiety level and test performance, an educational psychologist obtains a random sample of n = 6 college students from an introductory statistics course. The students are asked to come to the Educational Research and Evaluation Laboratory (EREL) 15 minutes before the final exam. In the lab, the researcher records the physiological measures of anxiety (heart rate, skin resistance, blood pressure, and so on) for each participant. Following the final, the researcher obtained the exam score for each participant. Table 1 summarizes the data.
Educational Statistics Coefficient of Determination - r 2 xy E A B C D F DATA
Educational Statistics Coefficient of Determination - r 2 xy Error between Y and Y Error between Y and ^Y Student Anxiety Rating Exam Score^Y (Y- Y)(Y- Y) 2 (Y- ^Y)(Y- ^Y) 2 A B C D E F Mean S.D r xy =-0.89r 2 xy =0.79