In Professor Krugman's economics course, the correlation between the students' total scores prior to the final examination and their final‑examination scores is ?=0.5.�=0.5. The pre‑exam totals for all students in the course have mean 280280 and standard deviation 40.40. The final‑exam scores have mean 7575 and standard deviation 8.8. Professor Krugman has lost Julie's final exam but knows that her total before the exam was 300.300. He decides to predict her final‑exam score from her pre‑exam total. © Macmillan Learning (a) What is the slope of the least-squares regression line of final-exam scores on pre-exam total scores in this course? Give your answer to one decimal place. slope: What is the intercept? Give your answer as a whole number. intercept:
In Professor Krugman's economics course, the
(a) What is the slope of the least-squares regression line of final-exam scores on pre-exam total scores in this course? Give your answer to one decimal place.
What is the intercept? Give your answer as a whole number.
The following information is obtained from provided data:
| Variable | Mean | Standard deviation |
| Pre-exam total score () | ||
| Final score () |
The given correlation coeff. value between and , i.e., .
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
