r Analysis: A. Incorrect. The symbol for the population coefficient of correlation is B. Correct. The symbol for the population coefficient of correlation is C. Incorrect. The symbol for the population coefficient of correlation is D. Incorrect. The symbol for the population coefficient of correlation is ANSWER: B Ref: Section 16.3-16.4 The symbol for the sample coefficient of correlation is: r Analysis: A. Correct. The symbol for the sample coefficient of correlation is r B. Incorrect. The symbol for the sample coefficient of correlation is r C. Incorrect. The symbol for the sample coefficient of correlation is r D. Incorrect. The symbol for the sample coefficient of correlation is r ANSWER: A Ref: Section 16.3-16.4 The coefficient of correlation is used to determine: the strength and direction of the linear relationship between and x y. the least squares estimates of the regression parameters. the predicted value of for a given value of y x. All of these choices. Analysis: A. Correct. The coefficient of correlation is used to determine the strength and direction of the linear relationship between and x y. B. Incorrect. The coefficient of correlation is used to determine the strength and direction of the linear relationship between and x y. C. Incorrect. The coefficient of correlation is used to determine the strength and direction of the linear relationship between and x y. D. Incorrect. The coefficient of correlation is used to determine the strength and direction of the linear relationship between and x y. ANSWER: A Ref: Section 16.3-16.4 If the coefficient of correlation between and is close to 1.0, this indicates that: x y causes to happen. y x causes to happen. x y both (a) and (b) . there may or may not be a causal relationship between and x y.
r Analysis: A. Incorrect. The symbol for the population coefficient of correlation is B. Correct. The symbol for the population coefficient of correlation is C. Incorrect. The symbol for the population coefficient of correlation is D. Incorrect. The symbol for the population coefficient of correlation is ANSWER: B Ref: Section 16.3-16.4 The symbol for the sample coefficient of correlation is: r Analysis: A. Correct. The symbol for the sample coefficient of correlation is r B. Incorrect. The symbol for the sample coefficient of correlation is r C. Incorrect. The symbol for the sample coefficient of correlation is r D. Incorrect. The symbol for the sample coefficient of correlation is r ANSWER: A Ref: Section 16.3-16.4 The coefficient of correlation is used to determine: the strength and direction of the linear relationship between x and y. the least squares estimates of the regression parameters. the predicted value of y for a given value of x. All of these choices. Analysis: A. Correct. The coefficient of correlation is used to determine the strength and direction of the linear relationship between x and y. B. Incorrect. The coefficient of correlation is used to determine the strength and direction of the linear relationship between x and y. C. Incorrect. The coefficient of correlation is used to determine the strength and direction of the linear relationship between x and y. D. Incorrect. The coefficient of correlation is used to determine the strength and direction of the linear relationship between x and y. ANSWER: A Ref: Section 16.3-16.4 If the coefficient of correlation between x and y is close to 1.0, this indicates that: y causes x to happen. x causes y to happen. both (a) and (b) . there may or may not be a causal relationship between x and y.
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