Six Sigma Black Belt Session 7 Exam Questions and Answers Fully Solved
A Lean Six Sigma team at an insurance company has been working on a project to reduce the number of
claim defects leading to denied claims. A control chart of claim denials is out-of-control. What
conclusion should the team draw from this condition?
A) The number of denials has gone up.
B) The number of denials has gone down.
C) The process is unstable over time.
D) The process is exhibiting less variability over time.
E) The process is exhibiting more variability over time. - Answers C) The process is unstable over time.
A Lean Six Sigma team is working to reduce the frequency of medical errors, and wishes to track the
number of errors per patient per day. The sample size of patients varies from day to day. Which type of
attribute control chart should the team use?
A) c Chart
B) p Chart
C) np Chart
D) u Chart
E) cp Chart - Answers D) u Chart
A diagnostic lab has chartered a Lean Six Sigma team to reduce the frequency of samples with label
problems. The team has data available on the percentage of samples with a label problem and wishes to
chart this measure. Volume is high and stable enough to assume a constant sample size. Which type of
attribute control chart should the team use?
A) c Chart
B) p Chart
C) np Chart
D) u Chart
E) cp Chart - Answers B) p Chart
After implementing process improvement actions, new data placed on the SPC chart of the old process
shows consistent variability about the mean on the X-bar chart, but the R chart shows eight points
below the R-bar line. What is happening?
A Lean Six Sigma team at an insurance company has been working on a project to reduce the number of
claim defects leading to denied claims. A control chart of claim denials is out-of-control. What
conclusion should the team draw from this condition?
A) The number of denials has gone up.
B) The number of denials has gone down.
C) The process is unstable over time.
D) The process is exhibiting less variability over time.
E) The process is exhibiting more variability over time. - Answers C) The process is unstable over time.
A Lean Six Sigma team is working to reduce the frequency of medical errors, and wishes to track the
number of errors per patient per day. The sample size of patients varies from day to day. Which type of
attribute control chart should the team use?
A) c Chart
B) p Chart
C) np Chart
D) u Chart
E) cp Chart - Answers D) u Chart
A diagnostic lab has chartered a Lean Six Sigma team to reduce the frequency of samples with label
problems. The team has data available on the percentage of samples with a label problem and wishes to
chart this measure. Volume is high and stable enough to assume a constant sample size. Which type of
attribute control chart should the team use?
A) c Chart
B) p Chart
C) np Chart
D) u Chart
E) cp Chart - Answers B) p Chart
After implementing process improvement actions, new data placed on the SPC chart of the old process
shows consistent variability about the mean on the X-bar chart, but the R chart shows eight points
below the R-bar line. What is happening?
