Six Sigma Six Sigma Certifications LSSMBB Questions & Answers

• Question 161:

  A ___________ is used primarily to track the stability of the average value of a metric of interest.

  A. NP Chart

  B. Xbar-R Chart

  C. I-MR Chart

  D. C Chart

  Correct Answer: B

• Question 162:

  For her injection molding project a Belt needed to track the percentage of defectives of a particular sample set so she used a ___________ to display the data?

  A. Individual Chart

  B. C Chart

  C. Xbar Chart

  D. P Chart

  Correct Answer: D

• Question 163:

  Suppose an X-bar / S Chart revealed that the variation of a process was consistent over time (consistent standard deviation, consistent mean) but a significant proportion of outcomes fell outside the customer requirements. Which of the following conclusions can best be made about the process?

  A. The process is in control but has poor capability

  B. The process variation is out of control

  C. Special or assignable causes are affecting the process

  D. The process mean needs to be reduced

  Correct Answer: A

• Question 164:

  The main feature(s) that differentiate the Control Chart from the Run Chart are which the following?

  A. The presence of a statistically calculated center line and upper and lower limits

  B. The Run Chart shows data over time and the Control Chart shows data at one point in time

  C. The Run Chart requires more data than the Control Chart

  D. The Run Chart is used in the “Measure” Phase while the Control Chart is used in the "Control" Phasex'

  Correct Answer: A

• Question 165:

  Which of the following are true regarding the Central Limit Theorem?

  A. Sample averages are normally distributed as sample size gets larger.

  B. Sample averages converge on the population mean.

  C. Sample standard deviations are dependent upon the standard deviation of the population from which it was sampled.

  D. All of the above

  Correct Answer: D

• Question 166:

  The most important process metrics are often determined by what the customer tells us is important to them. Which of these sequences describes the way customer requirements are converted to the customer-based process metrics?

  A. Voice of the customer>critical to quality metrics>critical customer requirements

  B. Voice of the customer>critical customer requirements>critical to process metrics

  C. Critical customer requirements>critical to quality metrics>critical to process metrics

  D. Voice of the customer>critical customer requirements>critical to quality metrics

  Correct Answer: D

• Question 167:

  Lean Six Sigma process I product improvement suggests that the measure we use in our business is directly derived from which of the following sources?

  A. Voice of Technology

  B. Voice of Finance

  C. Voice of the Customer

  D. The Six Sigma Project Team

  Correct Answer: C

• Question 168:

  You have been asked to monitor daily production yields to determine if the process yield is in statistical control. Select the control chart best suited for this purpose.

  A. C-chart

  B. U-chart

  C. X and R chart

  D. P-chart

  Correct Answer: D

• Question 169:

  A black belt at a call center is reviewing the length of calls, as shown below. The phone call length is not to exceed 4 minutes. Is the call-in-process capable?

  

  A. Yes, the data is from a stable population.

  B. No, many calls exceed the specification.

  C. Unsure, more data is needed.

  D. Yes, all the calls meet specification.

  Correct Answer: B

• Question 170:

  A black belt is reviewing a process, as shown below. The specification limits are 1200 +1— 200. Which of the following is the best statement?

  

  A. Cpk < Cp

  B. Cp < Cpk

  C. Cpk = Cp

  D. The process is on-target

  Correct Answer: A