Practice Quiz

Six Sigma Black Belt

Category - Black Belt

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A Black Belt practitioner at Vanguard Inc. is comparing the mean processing time of 10 different settings on a machine using ANOVA. What equation is used to calculate the Total Variation (SST) of the individual data values across the various settings?
  1. SSA+SSW
  2. SSB+SSA
  3. 1/SSW
  4. 1/SSA
Explanation
Answer: A - The equation used to calculate the Total Variation (SST) is SSA + SSW.

Key Takeaway: Total variation of the individual data values across the various machine settings is variation among the sample factor means (SSA) and variation that exists among the data values within a particular factor level (SSW).
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