27 The following computer printout estimated overhead costs using multiple regression: t for H(O) Std. error on Parameter Estimate Parameter = 0 Pr>t of parameter Intercept 1000 1.96 0.0250 510.204 Setup hours 25 81196 0.0001 0.305 # of parts 100 9.50 0.0001 10.527 R Square (R2 0.94 Standard Error (Se) 75.00 Observations 160 During the year the company used 1,000 setup hours and 500 parts. Which slope and intercept parameters are significant at the 0.05 level? During the year the company used 1,000 setup hours and 500 parts Which slope and intercept parameters are significant at the 0.05 level? Select one: a. all of the above b. setup hours c. intercept d. number of parts