What is the Mean, Mode & Median for the data in Column 1, Data Set A?
a. Mean = 8.7, Mode = 8, Median = 7
b. Mean = 8.7, Mode = 7, Median = 8
c. Mean = 8, Mode = 8.7, Median = 7
d. Mean = 7, Mode = 7, Median = 8.7
e. Mean = 8, Mode = 8, Median = 7 - Answer-Answer B
Formula:
Mean = S...
Six Sigma Green Belt Exam Questions
and Answers
What is the Mean, Mode & Median for the data in Column 1, Data Set A?
a. Mean = 8.7, Mode = 8, Median = 7
b. Mean = 8.7, Mode = 7, Median = 8
c. Mean = 8, Mode = 8.7, Median = 7
d. Mean = 7, Mode = 7, Median = 8.7
e. Mean = 8, Mode = 8, Median = 7 - Answer-Answer B
Formula:
Mean = Sum(x)/n = 8.7
Mode = Most frequent value = 7
Median = because sample is even (n=50), the median is the average of the (n/2)th and
((n/2)+1)th values in the sorted series = 8
Please reference Quantifying Process Variability for more information.
A call center was experiencing customer complaints about time-on-hold and an
improvement team was formed to solve the problem. The manager of the call center
joined the team's first meeting and informed the team that their project would be short-
lived because the obvious solution to the time-on-hold problem was to add more phone
lines. With this advice as a basis, the team crafted a problem statement: "Additional
phone lines are needed in order to reduce the average customer time-on-hold from 6.2
minutes to our target of 45 seconds".
Which of the following best describes the problem statement?
a. The statement is too broad to be useful in the particular situation.
b. The statement contains a solution.
c. The statement is not related to the problem described above.
d. This is a good problem statement.
e. The statement does not fully define "time-on-hold". - Answer-Answer B
The problem statement dictates that the solution is "additional phone lines". Please
reference Project Charter for more information.
What will a stakeholder analysis (RACI matrix) help the team do?
a. Narrow the project scope.
b. Reduce the likelihood of project roadblocks.
c. Choose effective team members.
d. Develop a focused problem statement.
e. Choose the most optimal project to pursue. - Answer-Answer B
,A stakeholder analysis is used to 1) identify those entities that will have influence on the
project, 2) identify the type of influence and 3) develop strategies to realize the positive
influences and reduce any roadblocks due to the negative influences. Please reference
Stakeholder Analysis - RACI Matrix for more information.
When analyzing a process, which of the following terms represents the inputs?
a. f(X)
b. X
c. Y
d. Result
e. Cost - Answer-Answer B
f(X) is the Transfer Function; Y is the process output, also sometimes referred to as the
Result; Cost could be either an input or output. Please reference Input Determines
Output for more information.
The fishbone diagram is used for which of the following?
a. To follow the movement of people in a process
b. To determine process capability
c. To categorize input variables that may be important
d. To prioritize the highest frequency problems
e. To show the process flow - Answer-Answer C
Please reference Cause & Effect Diagram Toolset for more information.
What is missing from the following Project Charter Business Case statement: "Process
Cycle Time must be reduced in order to meet customer requirements" ?
a. Team leader
b. Scope of project, including "included" and "not included"
c. Amount of improvement required and business impact
d. Measurement system to be used
e. Resources required - Answer-Answer C
The business case should state the level of improvement required, otherwise, there will
be no may to measure success. In addition, the economic impact should be included so
that it is clear why this project is a priority vs. something else.
Please reference Project Charter Toolset for more information.
Which of the following is a use for a Pareto Chart?
a. Determining Process capability
b. Learning the vital few (most common) types of defects
c. Determining significance of operator errors
d. Estimating measurement error
, e. Determining specific trends over time - Answer-Answer B
Pareto Charts sort occurence by order of frequency. Please reference Pareto Chart
Toolset for more information.
Which tool is used to convert brainstormed ideas into groups to better evaluate them?
a. Spaghetti diagram
b. Pareto chart
c. Affinity diagram
d. Quality Function Deployment
e. Scatter diagram - Answer-Answer C
Affinity Diagrams are used to sort raw information and establish recognizable groups or
patterns. Please reference Affinity Diagram Toolset for more information.
This question refers to the "Claims Processing" case. A hospital processes claims and
the insurance companies often reject them for coding errors. A Six Sigma team has
been working on a project to reduce coding errors for the past 15 months and the data
for the number and type of coding errors can be downloaded above in the
"ClaimCoding" file. Use this data to answer the question below.
Assuming that each claim has 20 opportunities for errors, what is the sigma level for
coding errors in months 1 and 15?
a. Month 1=4.7 sigma level, Month 15 = 3.3
b. Month 1=3.0 sigma level, Month 15 = 2.7
c. Month 1=4.7 sigma level, Month 15 = 3.7
d. Month 1=3.0 sigma level, Month 15 = 3.8
e. Month 1=3.0 sigma level, Month 15 = 3.3 - Answer-Answer E
M1 DPMO=(868x1,000,000)/(716X20); M15 PMO=(605x1,000,000)/(788X20). See
Sigma Level calculator for corresponding Sigma Level. Please reference Calculating the
Sigma Level - Toolset for more information.
This question refers to the "Claims Processing" case. A hospital processes claims and
the insurance companies often reject them for coding errors. A Six Sigma team has
been working on a project to reduce coding errors for the past 15 months and the data
for the number and type of coding errors can be downloaded above in the
"ClaimCoding" file. Use this data to answer the question below.
Considering the attribute nature of code counts, what chart would you use to check
whether the errors/claim are in statistical control over the time period?
a. p-chart
b. np-chart
c. u-chart
d. c-chart
e. Pareto Chart - Answer-Answer C
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