If R2 = .36 in the model Sales = 268 + 7.37 Ads, then Ads explains 36 percent of the variation in Sales.
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Q9: A sample correlation r = .40 indicates
Q10: A scatter plot is used to visualize
Q11: In a simple regression, the correlation coefficient
Q12: If r = .55 and n =
Q13: The correlation coefficient r always has the
Q15: In the model Sales = 268 +
Q16: When using the least squares method, the
Q17: The width of a prediction interval for
Q18: The correlation coefficient r measures the strength
Q19: The ordinary least squares regression line
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