Answer Happy

We have scores for 106 students who took both Exam 1 and Exam 2 in STAT 215 this semester. This is a plot of those scores: Exam 2 100+ 90+ 80! 70 60 so 40 SO 60 70 80 00 100 C. Part 2. The correlation coefficient between Exam 1 Score and Exam 2 Score was calculated. Based on the plot, which one of the following values is the most reasonable value for the correlation coefficient? O A. 0.99 OB. 0 O C. -0.61 OD. 0.49 Part 3. Based on the plot above, which variable is the response variable? O A. Exam 2 Score OB. Exam 1 Score Part 4. Linear regression was fit to predict Exam 2 score using Exam 1 score, and the following model was obtained: y = 39.9 +0.5x. For a student who scored an 80 on Exam 1, what is the predicted Exam 2 score? (decimal only, one decimal place) Part 5. Suppose that a student who scored an 80 on Exam 1 ended up scoring a 75 on Exam 2. What is the value of the residual for that student? (decimal only, one decimal place) Part 6. Would it be considered extrapolation to predict an Exam 2 score for someone who scored a 50 on Exam 1? O A. No