A scatter plot shows data points that are widely scattered around a line that slopes down to the right. Which value would be closest to the correlation for these data?

a. -0.80

b. -0.40

c. 0.80

d. 0.40

2. What is the value of SP for the following set of data?

X Y

1 4

2 4

9 1

a. -15

b. 5

c. -5

d. 15

3. For a set of n = 10 pairs of scores with X = 10, Y = 40, and XY = 50, the sum of products of deviation is SP = 10.

True

False