6.

a. Compute the Pearson correlation for the following set of data:

X Y 3

1 1 2 5 3 9 4 7

b. Add 5 points to each X value, and compute the Pearson correlation again.

c. When you add a constant to each score, what happens to 55 for X and Yl What happens to SP1 What happens to the correlation between X and Yl

d. Now multiply each X in the original data by 3, and calculate the Pearson correlation once again.

e. When you multiply by a constant, what happens to 55 for X and Yl What happens to SP1 What happens to the correlation between X and Yl