Problem 5 A manufacturer is claiming that his drill (PD1) can penetrate rock faster than the other drills available on the market. You decide to compare the PD1 against 2 other drills that your lab owns. You choose 15 random locations and assign 5 to each drill. You measure the rate of drilling in terms of feet drilled per hour. Based on your results can you conclude that PD1 is superior to the other two drills? If so to what drill? PDI DC6 IA99 14.7 35.2 25.8 30.1 29.7 28.9 37.6 26.6 23.3 34.3 30.1 16.2 31.5 28.8 20.1