1.Manually find the main effects of Feed Rate and Depth of Cut. 2. manually Compute a 95 percent confidence interval estimate (Tukey's test) of the mean difference in response for feed rates of 0.20 and 0.25 in/min.

Feed Rate Block Depth of Cut (in) (in /min) 0.15 0.18 0.2 0.25 74 79 82 99 0.2 64 68 88 104 60 73 92 96 92 98 99 104 0.25 86 104 108 110 88 88 95 99 99 104 108 114 0.3 98 99 110 111 102 95 99 107