ANOVA (Analysis of Variance) is a statistical tool used in Six Sigma to compare the means of three or more groups to determine if there are any statistically significant differences among them. It assesses the impact of one or more factors by comparing the variance within groups to the variance between groups. ANOVA tests help identify whether variations in data are due to actual differences in the groups or just random noise. This tool is crucial for process improvement, as it helps pinpoint factors that significantly affect performance, guiding data-driven decisions and enhancing overall quality and efficiency.
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