Six Sigma Green Belt Exam Prep

Category - Six Sigma Green Belt

Ron’s research team is examining the tread quality of their company’s new tires. The team decides to use a factorial design that is examining 2 types of tread in 3 different types of metal installations. What type of design is this?
  1. 2 X 2
  2. 2 X 3
  3. 6 X 1
  4. 3 X 3
Explanation
Answer: B - The above experimental design is a 2X3 factorial design.
Key Takeaway: Factorial design is a type of experimental design whereby 2 or more factors are studied, each with a number of levels. In this example, the tire treads are the factors while the metal installations are the levels. This type of design allows for a comparison of factors while examining for interaction effects between factors and levels.
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