If a coefficient is 4.75 with a p value of .045 and a standard error of .437, the t-value is approximately: Select one: a. 214 O b. 17.21 c. 10.86 Od. 2.076 A fixed cost implied by an intercept value of -$40,000 usually means: Select one: O a. the intercept is outside the model's relevant range O b. the regression has an inverse relation between X and Y O c. the regression model has a negative slope O d. The model is invalid as we cannot have negative dollar amounts A regression model may be made more accurate by: Select one: O a. increasing the number of observations O b. using the high-low (2 factor) algorithm O c. re-ordering the data from the lowest Y-value to the highest Y-value O d. setting the intercept as the data's point of origin