Question

1a. For the following scores,

Participant	X	Y
A	2	6
B	3	3
C	4	2
D	7	1

Draw a scatterplot by hand.

1b.

Based on the scatterplot:

Group of answer choices

a. )The correlation between X and Y is zero

b. The correlation between X and Y is 1)

c. )The correlation between X and Y is positive

d. )The correlation between X and Y is negative

1c.

Compute the Pearson Correlation Coefficient

r =

1d.

The correlation between X and Y is

Group of answer choices

a.) large and positive. As X increases, Y increases

b.) large and positive. As X increases, Y decreases

c.) medium and positive. As X increases, Y increases

d.)medium and positive. As X increases, Y decreases

e.)large and negative. As X increases, Y increases

f.)large and negative. As X increases, Y decreases

Answer 1

a)Scatter plot 7 6 5 4 3 N 1 . 0 0 1 2 wo 4 5 6 8 b)The correlation between x and y is negative c) у ху x2 ,2 X 2 6 12 4 36 9 3 3 9 9 4 2 8 16 4 7 1 7 49 1 16 12 36 78 50 Here n= 4 1 -0.8571 » Ex? - (2x)} | "Ey?- (Ev)] d)large and negative, as x increases y decreases