Question

Problem 4

Midterm scores in a class have an average of 75 and an SD of 8. Final exam scores in the class have an average of 50 and an SD of 10. The correlation between the two variables is 0.63 and the scatter diagram is football shaped.

Students complain that the final was too hard, so the instructor gives each student 15 more points on the final.

4b
The correlation between the new final scores and the old final scores is:

4c
The correlation between the new final scores and the midterm scores is:

Answer 1

4b= 1
4c= 0.63

Answer 2

thanks