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Certified Six Sigma Black Belt

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Question # 31

A Six Sigma team is reviewing the following data from a 2-sample t-test on Unit 1 and Unit 2 of a product. Variances are not assumed to be equal.

Question # 31

On the basis of this information below, which of the following conclusions would be appropriate to draw from this test?

Options:

A.  

Fail to reject the null hypothesis that the means are equal

B.  

Fail to reject the null hypothesis that the variances are equal

C.  

Reject the null hypothesis that the means are equal

D.  

Reject the null hypothesis that the variances are equal

Discussion 0
Question # 32

A benchmarking team has been formed to conduct studies on various internal processes to determine best practices. Between team meetings, members are responsible for completing which of the following tasks?

Options:

A.  

Observing processes and gathering data

B.  

Meeting with and updating the sponsor on team successes

C.  

Ensuring that the team’s findings are positive

D.  

Assisting the team leader in planning the next meeting

Discussion 0
Question # 33

Which of the following groups of people should be included in the communication plan for a Six Sigma project that is just being started?

Options:

A.  

Black Belts and Green Belts only

B.  

Finance department staff and Black Belts only

C.  

Senior management and the Master Black Belt only

D.  

All stakeholders

Discussion 0
Question # 34

When input variables are held constant and variation occurs in the response variable, the condition is referred to as

Options:

A.  

a Type I error

B.  

a discrete variable

C.  

an experimental error

D.  

randomization

Discussion 0
Question # 35

Which of the following tools should be used to identify the source of a performance gap?

Options:

A.  

Matrix diagram

B.  

Cause and effect diagram

C.  

Activity network diagram

D.  

Affinity diagram

Discussion 0
Question # 36

Which of the following tools should be used to gain a clear picture of a business process when trying to find opportunities for improvement?

Options:

A.  

Flowchart

B.  

Theory of constraints

C.  

Pareto chart

D.  

SWOT analysis

Discussion 0
Question # 37

In SPC, on an X̄ and R chart it is desirable that the X̄ chart detects process shift, and the R chart captures

Options:

A.  

assignable cause variation

B.  

the sample size

C.  

trends

D.  

common cause variation

Discussion 0
Question # 38

Which of the following sources of information is useful in facilitating interactions on a project team?

Options:

A.  

Meeting minutes

B.  

Routine status report

C.  

A communication plan

D.  

Team leader feedback

Discussion 0
Question # 39

A stable, normally distributed process has a mean of 503 and a standard deviation of 4. If the specification is 500 ± 10, with a target of 500, what is the Cpm value?

Options:

A.  

0.13

B.  

0.58

C.  

0.67

D.  

0.83

Discussion 0
Question # 40

Which of the following tools focuses on maximizing equipment effectiveness throughout the life of the equipment?

Options:

A.  

6S

B.  

OEE

C.  

TPM

D.  

Jidoka

Discussion 0
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