An Industrial engineer is studying the upward force exerted by a hydraulic drill machine. The engineer suspects that the drilling speed and the feed rate are the most important factors. Four levels of feed rate, and two levels of drilling speed are selected to investigate the in-depth process. Design a factorial experiment, test it at a = 0.05, and conclude results. Drill Speed Feed Rate (B) 0.015 0.030 0.045 0.060 2.70 2.45 2.60 2.75 125 2.78 2.49 2.72 2.86 2.83 2.85 2.86 2.94 200 2.86 2.80 2.87 2.88