Two Ways ANOVA
An engineer suspects that the surface finish of a metal part is
influenced by...
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Statistics
Two Ways ANOVA
An engineer suspects that the surface finish of a metal part isinfluenced by the feed rate and the depth of cut. She selects threefeed rates and four depths of cut. She then conducts a factorialexperiment and obtains the following data: (Use Minitab)
Depth of
Cut (in)
Feed Rate (in/min)
0.15
0.18
0.20
0.25
74
79
82
99
0.20
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
0.30
98
99
110
111
102
95
99
107
Analyze the data and draw conclusions. Use a =0.05.
Prepare appropriate residual plots and comment on the model’sadequacy.
Obtain point estimates of the mean surface finish at each feedrate.
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