Seven students made the following scores on two quizzes, X and Y: Student: ABCDEFG Score on X:3 9 7 8 467 Score on Y:2 78 6 657
(a) Construct a scatter diagram of the relationship between these two variables. What is the direction of the relationship?
(b) Compute r to two decimals using the raw-score method.
(c) If the two quizzes covered the same subject matter, what is it about the students' performance that r measures?