1. The Pearson correlation measures ____. A) the degree of relationship without

Question

1. The Pearson correlation measures ____.

A) the degree of relationship without regard to the formof the relationship
B) the degree to which the relationship is consistently onedirectional
C) the degree of linear relationship
D) the degree of curvilinear relationship

2. Which of the following pairs of variables should produce acorrelation near 0?

A) model year (2003, 2004, etc.) and price for a used Honda
B) driving distance from college and weekly cost of gas for a groupof commuting college students
C) number of hours studying and number of errors on a math exam
D) IQ and weight for a group of third-grade students

3. A scatterplot shows a set of data points that are widelyscattered around a line that slopes up to the right. Which of thefollowing values would be closest to the correlation for thesedata?

A) 0.80
B) 0.40
C) 0.40-
D) 0.80-

4. A negative value for a correlation indicates ____.

A) a much stronger relationship than if the correlation werepositive
B) a much weaker relationship than if the correlation werepositive
C) decreases in X tend to be accompanied by decreases in Y
D) decreases in X tend to be accompanied by increases in Y

5. A scatterplot shows a set of data points that are clusteredclose to a line that slopes down to the right. Which of thefollowing values would be closest to the correlation for thesedata?

A) 0.80
B) 0.40
C) 0.40-
D) 0.80-

6. The regression equation is determined by minimizing ____.

A) the total error between the X and Y values
B) the total error between the predicted Y values and the actual Yvalues
C) the total squared error between the X and the Y values
D) the total squared error between the predicted Y values and theactual Y values

Explanation / Answer

1. The Pearson correlation measures D) the degree of curvilinear relationship 2.pairs of variables should produce a correlation near 0is B) driving distance from college and weekly cost of gas for agroup of commuting college students
3.A scatterplot shows a set of data points that are widelyscattered around a line that slopes up to the right. thevalue would be closest to the correlation for these datais A) 0.80 4. A negative value for a correlation indicates D) decreases in X tend to be accompanied by increases inY 5.A scatterplot shows a set of data points that are clusteredclose to a line that slopes down to the right. Which of thefollowing values would be closest to the correlation for thesedata A) 0.80
6.The regression equation is determined by minimizing D) the total squared error between the predicted Y values andthe actual Y values

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