Since an interaction exists between “Weld energy” and “Weld pattern”, only an interaction plot is needed and no main factor plots are necessary. Interaction plot can be obtained by clicking Stat ÆDOE ÆFactorial ÆFactorial Plots. In the dialogue box, choose Interaction Plotand click Setup. In the Setup dialogue box, select factor A and B to include into the plots. P-value A small (<0.05, a level of significance) p-value indicates that the two main factors and their interactions have statistically significant effect on the response.
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