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Free ICBB – IASSC Certified Lean Six Sigma Black Belt Practice Test Question

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Showing 1–3 of 15 questions

Question 1

Which statement(s) are correct about the Factorial Plot shown here? (Choose three.)

Select all that apply, then click Submit answer.

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    When the cutting speed increased from low to high level, the tool age increases
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    The coefficient of the metal hardness is positively related to the output of tool age
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    The coded coefficient is lower for cutting speed than the cutting angle related to the output of tool age
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    These plots prove a statistically significance factor with 95% confidence
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    These plots are an example of interaction plots
Question 2

Which statement(s) are incorrect for the Regression Analysis shown here? (Choose two.)

Select all that apply, then click Submit answer.

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    The air-fuel ratio explains most of the TurbineOutput variation
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    The Regression explains over 98% of the process variation
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    This Multiple Linear Regression has three statistically significant independent variables
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    If the air-fuel ratio increases by 1, the TurbineOutput more than triples
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    The SteamExitTemp explains the most variation of the TurbineOutput
Question 3

Which statements are correct about the advanced Capability Analysis shown here? (Choose three.)

Select all that apply, then click Submit answer.

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    This is a Poisson Capability Analysis.
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    The average DPU with 95% confidence is between 0.024 and 0.0295.
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    The DPU does not seem to vary depending on sample size.
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    The process shows only one instance of being out of control statistically so we have confidence in the estimated DPU of this process.
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    The maximum DPU in one observation was nearly 0.0753.