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7. (16 pts, varied) Refer to the following data and scatterplots to respond to questions 7a-f. Individual ARe Score on Earning Potential 1 24 5 2 56 19 76 E 80 7 35 14 32 12 42 18 17 35 20 12 36 16 13 29 10 14 60 19 15 65 13 16 78 Some on Cainby Potential Page 4 of 6 EDUC 606- were on Caring Petrolia AgeFigure A represents a scatterplot constructed from the data; Figure B represents a regression line drawn through the scatterplot that "fits" the data points reasonably well; Figure C represents an ellipse drawn around the data points. a. (2 pts.) What is the overall direction of the correlation? b. (2 pts.) Estimate the strength of the correlation coefficient: Consider Figure D (below). Score on Earning Potential 20 15 10 20 70 Figure D C. (2 pts.) Using only the data points associated with age of 60 and above; what effect does this have on the direction and strength of the correlation coefficient? Page 5 of 6 EDUC 606- d (4 pts.) Explain why this is the case. C. (2 pts.) Why is it beneficial to examine truncated parts of this graph instead of the graph as a whole? f. (4 pts.) Identify how likely it is that a causal relationship has been indicated