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(b) Use a regression line to predict Julie's final-exam score. Give your answer as a whole number. Predicted final-score =

(b) Use a regression line to predict Julie's final-exam score. Give your answer as a whole number. Predicted final-score =

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Y=47+0.1x
In Professor Krugman's economics course, the correlation between the students’ total scores prior to the final examination and their final-examination scores is'r = 0.5. The pre-exam totals for all students in the course have mean 280 and standard deviation 40. The final-exam scores have mean 75 and standard deviation 8. Professor Krugman has lost Julie's final exam but knows that her total before the exam was 300. He decides to predict her final-exam score from her pre-exam total. lino of finol oxom scores on pre-eyam total scores in this course?
Transcribed Image Text:In Professor Krugman's economics course, the correlation between the students’ total scores prior to the final examination and their final-examination scores is'r = 0.5. The pre-exam totals for all students in the course have mean 280 and standard deviation 40. The final-exam scores have mean 75 and standard deviation 8. Professor Krugman has lost Julie's final exam but knows that her total before the exam was 300. He decides to predict her final-exam score from her pre-exam total. lino of finol oxom scores on pre-eyam total scores in this course?
(b) Use a regression line to predict Julie's final-exam score. Give your answer as a whole number. Predicted final-score =
Transcribed Image Text:(b) Use a regression line to predict Julie's final-exam score. Give your answer as a whole number. Predicted final-score =
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