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17. B is correct. The coefficient of determination is the same as the R-squared.

18. C is correct. Deleting observations with small residuals will degrade the strength of the regression, resulting in an increase in the standard error and a decrease in the R-squared.

19. C is correct. For a regression with one independent variable, the correlation is the same as the Multiple R with the sign of the slope coefficient. Because the slope coefficient is positive, the correlation is 0.8623.

20. B is correct. This answer describes the calculation of the F-statistic.

21. C is correct. To make a prediction using the regression model, multiply the slope coefficient by the forecast of the independent variable and add the result to the intercept.

22. C is correct. The p-value reflects the strength of the relationship between the two variables. In this case the p-value is less than 0.05, and thus the regression of the ratio of cash flow from operations to sales on the ratio of net income to sales is significant at the 5 percent level.