Lean Six Sigma Practice Test Exam
Questions And Answers With Correct
Solutions
*What is the key benefit of multi-vari charting? - ANS -It assists in the breakdown of components of
variation
*Deciding to collect sample from a population is often: - ANS -An Economical decision
*A Six Sigma project had a lot of improvement measures suggested on training people, setting
standardized job instructions, getting surveys done from employees, and so on. Who would be the
focused audience for whom this project was aimed at? - ANS -Internal Customers
*Cause and Effect Diagram when used with 5 WHY helps you in understanding the root cause of the
problem. In doing so, what does the Six Sigma team wish to know? - ANS -The assignable causes
(Identification of root cause means you have been able to assign a cause to the cause of variation. It also
means that you have been able to identify Assignable causes of variation, as common causes are
untraceable to their causes.)
*Which of the below mentioned tools is considered best to inform employees of their work roles, in
terms of ease of understanding and implementation? - ANS -Written Instructions
*In embracing Six Sigma, what has been the principal motivating factor from the point of view of upper
management? - ANS -Bottom line results
* (Don't Use Now)!!!!The purpose of "rolled throughput yield" in Six Sigma would NOT be to: - ANS -Use
the calculation for customer analysis
,(All the answer choices are reasons for using a throughput yield to help analyze a possible problem with
the exception of answer choice c)
*A company making rubber tires is evaluated on 5 opportunities per product; in 1000 products
manufactured in a month if 100 defects are observed, the Rolled Throughput Yield is: - ANS -98%
Total Opp.= 5000 Total Defects = 100/5000 Defects/ Mill. Opp. = 100/5000*10,00,000= 20,000 Sigma
levels using table is approximately 3.6. Sub. 3.6 in RTY table = 98%
*What is Lean philosophy - ANS -Provide perfect value to the customer through a perfect value creation
process that has zero
*When samples are drawn out of a population randomly, what is said to be true?
a) The sample mean is always the same as population mean
b) The sample stud dev. will be the same as population stud. dev.
c) The sampling distribution approaches normality with increase in sample size
d) The sampling distribution would be triangular if population is distributed as triangular distribution -
ANS -c
*Which of the following tools is most used in the define phase of a project? - ANS -Affinity diagram
*Which of these is considered a technique to collect data or comments from customers? - ANS -Focus
Groups
DONT USE!!!!*Which of the following cannot be considered as an acceptable reason for deploying a Six
Sigma DMAIC project? - ANS -Improve the Design
, *Sum Square of Error is = to: - ANS -Sum Squares due to Pure Error + Sum Squares due to Lack of Fit
*The p value for Moods Median test is .02 and the level of significant is set at .05, what decision is
made? - ANS -Reject null hypothesis
(For hypothesis testing if the p value is smaller than the significance level the null hypothesis is rejected)
*What type of waste would the following scenario potentially cause? A clothing manufacturing is
producing more items than what the customer has ordered. - ANS -Over Production
*Which of the following variations are identified in control charts?
a) Random and chance
b) Special and assignable
c) Normal and Special
d) Normal and random - ANS -c
*Which of the following tools helps in visualizing series of causes to an effect? - ANS -Ishikawa diagram
(There are normally a series of root causes stemming from one problem, and they can be visualized in
cause and effect manner using Cause-and-Effect diagram.)
*Which of the following statistical tests should be used by the Green Belt for testing the means between
two inter-related groups? - ANS -Paired t test
(Paired t test is the only test that works on related groups.)
*Standard Deviation in Six Sigma applications is referred to as difference from the: - ANS -Mean
*In a typical DFSS Approach, which of these stages figures in most DFSS approaches? - ANS -Identify
Questions And Answers With Correct
Solutions
*What is the key benefit of multi-vari charting? - ANS -It assists in the breakdown of components of
variation
*Deciding to collect sample from a population is often: - ANS -An Economical decision
*A Six Sigma project had a lot of improvement measures suggested on training people, setting
standardized job instructions, getting surveys done from employees, and so on. Who would be the
focused audience for whom this project was aimed at? - ANS -Internal Customers
*Cause and Effect Diagram when used with 5 WHY helps you in understanding the root cause of the
problem. In doing so, what does the Six Sigma team wish to know? - ANS -The assignable causes
(Identification of root cause means you have been able to assign a cause to the cause of variation. It also
means that you have been able to identify Assignable causes of variation, as common causes are
untraceable to their causes.)
*Which of the below mentioned tools is considered best to inform employees of their work roles, in
terms of ease of understanding and implementation? - ANS -Written Instructions
*In embracing Six Sigma, what has been the principal motivating factor from the point of view of upper
management? - ANS -Bottom line results
* (Don't Use Now)!!!!The purpose of "rolled throughput yield" in Six Sigma would NOT be to: - ANS -Use
the calculation for customer analysis
,(All the answer choices are reasons for using a throughput yield to help analyze a possible problem with
the exception of answer choice c)
*A company making rubber tires is evaluated on 5 opportunities per product; in 1000 products
manufactured in a month if 100 defects are observed, the Rolled Throughput Yield is: - ANS -98%
Total Opp.= 5000 Total Defects = 100/5000 Defects/ Mill. Opp. = 100/5000*10,00,000= 20,000 Sigma
levels using table is approximately 3.6. Sub. 3.6 in RTY table = 98%
*What is Lean philosophy - ANS -Provide perfect value to the customer through a perfect value creation
process that has zero
*When samples are drawn out of a population randomly, what is said to be true?
a) The sample mean is always the same as population mean
b) The sample stud dev. will be the same as population stud. dev.
c) The sampling distribution approaches normality with increase in sample size
d) The sampling distribution would be triangular if population is distributed as triangular distribution -
ANS -c
*Which of the following tools is most used in the define phase of a project? - ANS -Affinity diagram
*Which of these is considered a technique to collect data or comments from customers? - ANS -Focus
Groups
DONT USE!!!!*Which of the following cannot be considered as an acceptable reason for deploying a Six
Sigma DMAIC project? - ANS -Improve the Design
, *Sum Square of Error is = to: - ANS -Sum Squares due to Pure Error + Sum Squares due to Lack of Fit
*The p value for Moods Median test is .02 and the level of significant is set at .05, what decision is
made? - ANS -Reject null hypothesis
(For hypothesis testing if the p value is smaller than the significance level the null hypothesis is rejected)
*What type of waste would the following scenario potentially cause? A clothing manufacturing is
producing more items than what the customer has ordered. - ANS -Over Production
*Which of the following variations are identified in control charts?
a) Random and chance
b) Special and assignable
c) Normal and Special
d) Normal and random - ANS -c
*Which of the following tools helps in visualizing series of causes to an effect? - ANS -Ishikawa diagram
(There are normally a series of root causes stemming from one problem, and they can be visualized in
cause and effect manner using Cause-and-Effect diagram.)
*Which of the following statistical tests should be used by the Green Belt for testing the means between
two inter-related groups? - ANS -Paired t test
(Paired t test is the only test that works on related groups.)
*Standard Deviation in Six Sigma applications is referred to as difference from the: - ANS -Mean
*In a typical DFSS Approach, which of these stages figures in most DFSS approaches? - ANS -Identify
