为什么ANVOA分析时没有Interaction项？

Gage R&R Study - ANOVA Method

Two-Way ANOVA Table With Interaction

Source DF SS MS F P
Part 9 88.8359 9.87066 276.325 0.000
Appraiser 2 3.7010 1.85052 51.804 0.000
Part * Appraiser 18 0.6430 0.03572 0.623 0.867
Repeatability 60 3.4389 0.05732
Total 89 96.6189


Two-Way ANOVA Table Without Interaction

Source DF SS MS F P
Part 9 88.8359 9.87066 188.615 0.000
Appraiser 2 3.7010 1.85052 35.361 0.000
Repeatability 78 4.0819 0.05233
Total 89 96.6189


Gage R&R

%Contribution
Source VarComp (of VarComp)
Total Gage R&R 0.11227 9.33
Repeatability 0.05233 4.35
Reproducibility 0.05994 4.98
Appraiser 0.05994 4.98
Part-To-Part 1.09093 90.67
Total Variation 1.20320 100.00


Study Var %Study Var
Source StdDev (SD) (6 * SD) (%SV)
Total Gage R&R 0.33507 2.01042 30.55
Repeatability 0.22876 1.37257 20.86
Reproducibility 0.24483 1.46895 22.32
Appraiser 0.24483 1.46895 22.32
Part-To-Part 1.04447 6.26684 95.22
Total Variation 1.09690 6.58142 100.00


Number of Distinct Categories = 4


Gage R&R for Data