Standardized Test Scores Problem: Figure 8-2h shows a scatter plot of the scores of 1000
Chapter 8, Problem 4(choose chapter or problem)
Standardized Test Scores Problem: Figure 8-2h shows a scatter plot of the scores of 1000 12th-graders on the mathematics part of the SAT (Scholastic Aptitude Test) and their high school grade point averages. By regression, the best-fitting linear function is = 59.0x + 355, but the coefficient of determination is only r2 0.14. Figure 8-2h a. Suppose that you have a 4.0 grade point average. According to the regression equation, what score would you be predicted to get on the SAT? How reliable do you think this prediction is? b. Use the given information to find the correlation coefficient. Explain why you would use the positive square root rather than the negative one.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer