A. Ten students obtained the following scores on two short tests, X and Y: (7 points)

Students	X	Y
A	7	7
B	8	6
C	1	12
D	6	4
E	5	3
F	3	10
G	6	4
H	5	3
I	2	6
J	1	12

1. Construct a scatterplot. (2 points)

2. Describe the relationship you see on the scatterplot in terms of direction and magnitude. (2 points)

3. Calculate the Pearson correlation coefficient. Use two decimal places. (2 points)

4. If the two tests cover the same material, what does the Pearson coefficient measure regarding student performance? (1 point)

B. The following table presents data regarding smoking and lung cancer (United States Department of Health and Human Services, 1982): (8 points)

COUNTRY	Per capita cigarette consumption in the 1930s	Death of men (in millions) from lung cancer in 1950
Iceland	240	60
Norway	250	90
Sweden	310	120
Denmark	370	160
Australia	450	160
Netherlands	450	240
Canada	500	150
Swiss	530	250
Finland	1110	350
Uniited Kingdom	1130	460
USA	1280	190

1. Construct a scatterplot. (2 points)

2. Describe the relationship you see on the scatterplot in terms of direction and magnitude. (2 points)

3. Calculate the Pearson correlation coefficient. Use two decimal places. (2 points)

4. How does your description of direction and magnitude using the scatterplot compare with the result for Pearson's coefficient? (2 points)

C. Use the data from Exercise B to do the following: (5 points) 1. Convert the scores for both variables to an ordinal scale. (2 points) 2. Calculate Spearman's correlation coefficient. (2 points) 3. How does Pearson's correlation coefficient from Exercise B compare with Spearman's correlation coefficient? (1 point)