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Six Sigma LSSMBB Exam Practice Questions (P. 2)

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Question #11
What is the correct order of steps in an experiment (DOE)?
✑ Design the experiment & plan data collection
✑ Run the experiment and collect data
✑ State the problem or objective
✑ Analyze the results
✑ Interpret the results`
  1. A
    1, 3, 4, 2, 5
  2. B
    3, 1, 2, 4, 5
  3. C
    3, 1, 4, 2, 5
  4. D
    3, 1, 2, 5, 4

Correct Answer:
B

Question #12
Which of the following experimental designs could you run if you had 5 factors and a maximum of 21 experimental units?
  1. A
    26-2 with 6 center points
  2. B
    25 with 3 center points
  3. C
    25-1 with 5 center points
  4. D
    24 with 5 center points

Correct Answer:
C

Question #13
The four basic objectives for experiments, which are a vital part of Lean Six Sigma, include Screening, Optimization, and which of the following?
  1. A
    Result, Comparison
  2. B
    Comparison, Robust Design
  3. C
    Reduced Variance, Parsimony
  4. D
    Comparison, Result

Correct Answer:
B

Question #14
Experimental error includes the ____________ in the experiment caused by uncontrolled and unknown nuisance factors. This is also called____________.
  1. A
    Noise/pure error
  2. B
    Noise/signal
  3. C
    Signal/noise
  4. D
    Pure error/signal

Correct Answer:
A

Question #15
A Black Belt candidate has found that three process factors significantly affect process throughput and variability. He suspects that the influence of one of the factors is non-linear over the range of throughput. Which of the following tools should be used to determine the relationship between the factors and responses?
  1. A
    Screening factorial experiment
  2. B
    Response surface method (RSM) experiment
  3. C
    Multiple linear regression analysis
  4. D
    2-Level Full Factorial experiment

Correct Answer:
B

Question #16
A full factorial experiment is characterized by all of the following properties EXCEPT:
  1. A
    All factors in the experiment are controlled
  2. B
    Higher level interaction effects cannot be estimated
  3. C
    All combinations of the levels of the factors are run in the experiment
  4. D
    The 2-factor, 2-level design is the simplest full factorial experiment

Correct Answer:
B

Question #17
A Black Belt has run a full factorial experiment. The below image illustrates an interaction plot from the analysis. What level of interaction is there between these two factors?

  1. A
    No interaction
  2. B
    Strong interaction
  3. C
    Weak interaction
  4. D
    Three-way interaction

Correct Answer:
B

Question #18
A Black Belt runs an experiment on 2 different shifts comparing two different methods for data entry. The Black Belt wants to learn if there is a difference between methods. She suspects that shifts have impact on the response. However, she is not interested in optimizing the shift. What experimental design technique should the Black Belt use?
  1. A
    Repeats only
  2. B
    Replication and repeats
  3. C
    Run in standard order
  4. D
    Blocking

Correct Answer:
D

Question #19
What is the AB interaction effect of:

  1. A
    4
  2. B
    2
  3. C
    -2
  4. D
    6

Correct Answer:
B

Question #20
Given the image below, what is the main effect of A?

  1. A
    -3
  2. B
    3
  3. C
    -6
  4. D
    6

Correct Answer:
A

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