1. Which of the following statements concerning correlation and regression is true: If the correlation between x and y is negative, then the slope of the regression line that predicts y from x will be negative. O If the correlation between x and y equals 0.7, then 70 percent of the variability in the y-variable is explained by the regression. If the correlation between x and y is high, then it is always appropriate to use regression to predict y from x. O If the correlation between x and y is negative, then it is never appropriate to use regression to predict y from X.

Q: 144

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Q: 1805

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Q: 6   9,171.6

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A: