Six Sigma Black Belt Exam Prep - Question List

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6.

In an Interrelationship Digraph, a(n) _______ and ______ relationship between two variables is depicted visually.

  1. internal; external
  2. diversion; conversion
  3. cause; effect
  4. antecedent; precedent
7. Project scope can be limited by the following factors EXCEPT:
  1. geography
  2. demographics
  3. organizational structures
  4. ten year financial projects
8.

The Define phase is the first phase of Six Sigma’s DMAIC cycle. If this phase is not planned for and carried out thoroughly, a project may stall and not transition to other phases successfully. Which of the following project statements is well-defined?

  1. Encourage vendors to pay their invoices on time by threatening legal action
  2. Improve employee morale by increasing cooperation
  3. Reduce the reject rate of service B from 30% to 10% within 2 calendar years
  4. Launch a nationwide CEO recruitment campaign
9. A Black Belt practitioner states in a project report that “we are 95% confident that the average age of consumers of Product A are between 34 and 38 years”. What does a confidence interval denote?
  1. they are 5% confident about the average age of the population
  2. they are 95% confident about the average age of the sample
  3. they are 5% confident about the average age of the sample
  4. they are 95% confident about the average age of the population
10. According to the Central Limit Theorem, regardless of the population from which data is drawn, the sampling distribution of the mean when sufficiently large is:
  1. normally distributed
  2. abnormally distributed
  3. skewed towards the outliers
  4. skewed towards the standard deviation

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