Free CLSSBB – Certified Lean Six Sigma Black Belt Practice Test Question

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  The dependent variable is the outside temperature

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  The relationship between outside temperature and number of customers per hour is a Linear Regression

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  The dashed lines indicate with 95% confidence where all of the process data should fall between

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  The dashed lines indicate with 95% confidence the estimate for the Quadratic Regression Line

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  The predicted number of customers per hour is close to 5 if the outside temperature is 10 deg C
  
  

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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
  
  

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  The initial focus for this project would be to determine why the thicknesses are so frequently too low.

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  The majority of the process is closer to the lower specification limit.

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  This process is described with the Weibull Distribution.

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  The process has more problems with Variation than Centering.

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  The process follows a non-normal distribution with the given data.