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Q. Which of the following is true of the slope of the least-squares regression line?

A.It has the same sign as the correlation. B.The square of the slope equals the fraction of the variation in the response variable that is explained by the explanatory variable. C.It is unitless.

Q. Which of the following measures only the strength of a relationship?

A.The Correlation coefficient. B.The slope. C.The Coefficient of Determination.

Q. Which of the following does not have an error?

A.The correlation between students' majors and their GPA is 0.67. B.The correlation between students' IQ scores and their foot size is 0.67. C.The correlation between students' incomes and their GPA is 1.12.

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