12. The method of least squares calculates values for the slope and intercept that a. minimizes the sum of the squared deviations between the actual and average values of X. b. minimizes the sum of the squared deviations between the actual and average values of Y. C. minimizes the sum of the squared deviations between the actual values of Y and X. d. minimizes the sum of the squared deviations between the actual and predicted values of Y. C. none of the above 13. The F-statistic is used to determine if: a. at least two of the independent variables are significantly related to the dependent variable b. all of the independent variables are significantly related to the dependent variable the R- value is greater than 0.5 the R value is greater than 0.9 none of the above 14. The t-statistic is used to determine a. the impact a one unit change in the dependent variable has on the independent variable. b. whether all of the independent variables are significantly related to the dependent variable whether a specific independent variable is significantly related to the dependent variable C. C. the intercept of the regression line. d. none of the above