1) CNC Machine: Only bring your ANOVA to the exam. Four different feed rates wer
ID: 703031 • Letter: 1
Question
1) CNC Machine: Only bring your ANOVA to the exam. Four different feed rates were investigated in an experiment on a CNC machine producing a component part used in an aircraft auxiliary power unit. The manufacturing engineer in charge of the experiment knows that a critical part dimension of interest may be affected by the feed rate. However, prior experience has indicated that only dispersion effects are likely to be present. That is, changing the feed rate does not affect the average dimension, but it could affect dimensional variability. The engineer makes five production runs at each feed rate and obtains the standard deviation of the critical dimension (in 103 mm). The data are shown below. Assume that all runs were made in random order. At an a 0.05 does feed rate have any effect on the standard deviation of this critical dimension? Feed Rate Production Run min 10 12 14 0.09 0.06 0.11 2 0.10 0.09 0.08 0.13 0.08 0.07 0.12 0.07 0.12 0.08 0.05 0.06 16 0.19 0.130.15 0.20 0.11Explanation / Answer
ANSWER:
:
The regression equation is
Production Run = - 0.0060 + 0.00850 Feed rate
Predictor Coef SE Coef T P
Constant -0.00600 0.04883 -0.12 0.904
Feed rate 0.008500 0.003702 2.30 0.034
S = 0.0370210 R-Sq = 22.7% R-Sq(adj) = 18.4%
Analysis of Variance
Source DF SS MS F P
Regression 1 0.007225 0.007225 5.27 0.034
Residual Error 18 0.024670 0.001371
Total 19 0.031895
Comment: The likely p-value as of the learn of discrepancy table is 0.034. It be less than 0.05 height of import Hence, we know how near close that the nourish fee have any upshot on top of the rest deviation of the vital dimension.
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