An engineer suspects that the cutting speed (in inches) and feed rate (inches/minute) affect the surface finish of the metal part. For study the engineer gathered four cutting speeds and 3 feed rates and conducted a 2 factor experiment to obtain the data in Table with 3 replications. Make ANOVA at α = 0.05 to test for the significance of all possible effects.
Table
Feed Rate |
Cutting Speed |
0.10 |
0.20 |
0.30 |
100 |
54, 60, 65 |
79, 68, 80 |
99, 88, 94 |
200 |
98, 89, 94 |
98, 106, 90 |
100, 98, 108 |
300 |
109, 98, 89 |
100, 108, 94 |
99, 82, 102 |
400 |
112, 100, 82 |
94, 104, 108 |
98, 116, 106 |