You believe that variable X directly (positively) affects the value of variable Y . After running a regression, the parameter estimate of X is +0.49 and the t -statistic is 0.03. You would thus conclude that Question 12Select one: a. While statistically significant, the parameter has an unexpected sign. The X variable should be discarded from the regression model and re-run. b. The parameter has the expected sign but is statistically insignificant; therefore you cannot rule out the possibility that X has no discernible effect on Y . c. The parameter has the correct sign and is statistically significant. d. Since the t -statistic is less than the parameter value, the relationship between X and Y is actually negative or inversely related