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Free IASSC ICBB Practice Questions & Answers 2026 Part2 | Certified Lean Six Sigma Black Belt

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Question #1
Assessing process proportion as opposed to evaluating a process with respect to a set target can be done using which of these?
A. Process proportion equals some value range
B. Process proportion equals some desired value
C. Target is current
D. Proportion of the tail is equal
View answer
Correct Answer: B
Question #2
Questions that can be best answered by a Visual Factory include all of these except _____________.
A. Are downtime issues easily noted?
B. Can extra inventory be seen easily?
C. Are unneeded tools or supplies easily noted?
D. Are setups optimized for lower scrap levels?
View answer
Correct Answer: D
Question #3
Range Charts are the technique used to determine if Special Causes are occurring within the subgroups of the __________.
A. Histograms
B. SPC Charts
C. NP Charts
D. Pareto Charts
View answer
Correct Answer: B
Question #4
For the data shown here which statement(s) are true? (Note: There are 2 correct answers).
A. With 95% confidence, we cannot conclude if the samples are from three Normal Distributions
B. With greater than 95% confidence, we conclude the samples are from Non-normal Distributions
C. If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test
D. If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test
View answer
Correct Answer: BD
Question #5
Assessing process proportion as opposed to evaluating a process with respect to a set target can be done using which of these?
A. Process proportion equals some value range
B. Process proportion equals some desired value
C. Target is current
D. Proportion of the tail is equal
View answer
Correct Answer: B
Question #6
Which of these elements are not included in Implementation plans?
A. ork breakdown structure
B. isk management plans
C. ost/Benefit ratios
D. lanned audits of work completion
View answer
Correct Answer: C
Question #7
Cost of Poor Quality (COPQ) can be classified as Visible Costs and Hidden Costs. All these items are Hidden Cost except __________________.
A. ALost Customer Loyalty
B. BReturns
C. CTime Value of Money
D. DLate Delivery
View answer
Correct Answer: B
Question #8
Range Charts are the technique used to determine if Special Causes are occurring within the subgroups of the __________.
A. Histograms
B. SPC Charts
C. NP Charts
D. Pareto Charts
View answer
Correct Answer: B
Question #9
For the data shown here which statement(s) are true? (Note: There are 2 correct answers).
A. With 95% confidence, we cannot conclude if the samples are from three Normal Distributions
B. With greater than 95% confidence, we conclude the samples are from Non-normal Distributions
C. If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test
D. If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test
View answer
Correct Answer: BD
Question #10
A(n)_______________ is best used to compare a Machine 1 average quality characteristic to the same quality characteristic of Machine 2.
A. F test
B. 1-Sample t-test
C. 2-Sample t-test
D. ANOVA test
View answer
Correct Answer: C
Question #11
For the data shown here which statement(s) are true? (Note: There are 2 correct answers).
A. With 95% confidence, we cannot conclude if the samples are from three Normal Distributions
B. With greater than 95% confidence, we conclude the samples are from Non-normal Distributions
C. If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test
D. If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test
View answer
Correct Answer: BD
Question #12
The relationship between a response variable and one or more independent variables is investigated and modeled by use of____________________.
A. X-Y Matrix
B. Baldridge Assessment
C. Analysis of Variance (ANOVA)
D. Critical X's Definition
View answer
Correct Answer: C
Question #13
A valid Multiple Linear Regression (MLR) is characterized by all of these except____________.
A. It is an assumption that the X’s (inputs) are not correlated to each other
B. The X’s (inputs) are assumed to be independent of each other
C. MLR is conducted based on a deliberate form of experimentation
D. The Residuals from MLR analysis have to be Normally Distributed
View answer
Correct Answer: C
Question #14
Which statement(s) are correct about the DOE Factorial plot output here? (Note: There are 3 correct answers).
A. Two factors were operated at 3 levels each
B. The highest tool age was achieved with metal hardness at high level while keeping the cutting speed at the low level
C. The design indicated above is a 32 factorial design
D. The cutting speed and cutting angle are at the low level for the least tool age achieved
E. All factors had 2 levels in the experiment
View answer
Correct Answer: BCE
Question #15
Fractional Factorial, ____________and Response Surface Method are types of planned experiments.
A. ulti-Vari Analysis
B. aldridge Channels
C. ne Factor at a Time or OFAT
D. actorial Design
View answer
Correct Answer: D
Question #16
If the production is for higher volume and monitoring and the Mean and variability is to be monitored for four machines producing product and the characteristic to be monitored is Variable Data, which SPC Chart is best to be selected?
A. bar-R Chart
B. ndividual-MR Chart
C. P Chart
D. USUM Chart
View answer
Correct Answer: A
Question #17
The relationship between a response variable and one or more independent variables is investigated and modeled by use of____________________.
A. X-Y Matrix
B. Baldridge Assessment
C. Analysis of Variance (ANOVA)
D. Critical X's Definition
View answer
Correct Answer: C
Question #18
For the data set shown here which of these statements is/are true?
A. Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples
B. A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set
C. Grade A has the lowest sample Mean of the 3 samples
D. Grade A has a higher sample Mean than Grade B
View answer
Correct Answer: C
Question #19
A Factorial Experiment based on a Level 2 Design with 6 factors would require 16 runs to fully assess the interactions.
A. True
B. False
View answer
Correct Answer: B
Question #20
The relationship between a response variable and one or more independent variables is investigated and modeled by use of____________________.
A. X-Y Matrix
B. Baldridge Assessment
C. Analysis of Variance (ANOVA)
D. Critical X's Definition
View answer
Correct Answer: C
Question #21
Which statement is NOT correct about the Fitted Line Plot shown here?
A. The independent variable is the reactant
B. If the reactant was 6 units, with 95 % confidence we would expect a minimum yield of 100 units
C. With at least 95% confidence, we can expect less than 10 units of Yield when the reactant is at a value of 1
D. A reactant value between 2 and 4 units yields around 20 to 40
E. When the reactant increases, the expected yield would increase
View answer
Correct Answer: D
Question #22
A dock worker for a feed supplier was tasked with assuring the proper weight in the feed bags as they left the dock. One of the columns listed the range of weight of the bags included in the studies. This required plotting a Histogram of the weight of the bags. While drawing the Histogram the x-axis contained a certain scale of data. Pick the scale of data that is appropriate for Histograms.
A. AOrdinal Scale Data
B. BInterval Scale Data
C. CNominal Scale Data
D. DRation Scale Data
View answer
Correct Answer: B
Question #23
A Belt rearranged the location of the parts inventory for a rework station locating the most often used parts to be within hand reach of the repair person. This rearrangement resulted in quicker repair times by eliminating one of seven major elements of waste which is the Waste of __________.
A. nventory
B. otion
C. onveyance
D. aiting
View answer
Correct Answer: B
Question #24
A ___________ problem in the Measurement System suggests that there is a lack of consistency in the measurement over time.
A. inearity
B. agnitude
C. ias
D. tability
View answer
Correct Answer: D
Question #25
Situations where standardized work needs to be incorporated include all of these except _____________________.
A. achines continually operating to reduce the labor cost per piece
B. rocess flow for the same product assembly taking various cycle time for completion
C. hangeover instructions incomplete
D. ack of a system to assure proper inventory levels at repair stations
View answer
Correct Answer: A
Question #26
Which of these items contribute to what is necessary for successful Kaizen events?
A. Analysis tools
B. Management support
C. Operator support
D. All of these answers are correct
View answer
Correct Answer: D
Question #27
Common and __________Cause Variation are the focus of Statistical Process Control.
A. Uncommon
B. Ordinary
C. Special
D. Selective
View answer
Correct Answer: C
Question #28
A Factorial Experiment based on a Level 2 Design with 6 factors would require 16 runs to fully assess the interactions.
A. ATrue
B. BFalse
View answer
Correct Answer: B
Question #29
For the data shown here which statement(s) are true? (Note: There are 2 correct answers).
A. With 95% confidence, we cannot conclude if the samples are from three Normal Distributions
B. With greater than 95% confidence, we conclude the samples are from Non-normal Distributions
C. If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test
D. If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test
View answer
Correct Answer: BD
Question #30
For the data set shown here which of these statements is/are true?
A. Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples
B. A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set
C. Grade A has the lowest sample Mean of the 3 samples
D. Grade A has a higher sample Mean than Grade B
View answer
Correct Answer: C
Question #31
A(n)_______________ is best used to compare a Machine 1 average quality characteristic to the same quality characteristic of Machine 2.
A. F test
B. 1-Sample t-test
C. 2-Sample t-test
D. ANOVA test
View answer
Correct Answer: C
Question #32
As a means of measuring the effects on other areas of a process as a result of changes in the primary metric we also define and track ________________.
A. AParallel process metrics
B. BSecondary metrics
C. CTertiary metrics
D. DIndustry standards
View answer
Correct Answer: B
Question #33
The relationship between a response variable and one or more independent variables is investigated and modeled by use of____________________.
A. X-Y Matrix
B. Baldridge Assessment
C. Analysis of Variance (ANOVA)
D. Critical X's Definition
View answer
Correct Answer: C
Question #34
Fractional Factorial designs are used to reduce the __________because the number of runs has been lowered.
A. Time and cost of experiments
B. Number of people involved
C. Number of data measurement points
D. Output summary
View answer
Correct Answer: A
Question #35
Assessing process proportion as opposed to evaluating a process with respect to a set target can be done using which of these?
A. Process proportion equals some value range
B. Process proportion equals some desired value
C. Target is current
D. Proportion of the tail is equal
View answer
Correct Answer: B
Question #36
For the data set shown here which of these statements is/are true?
A. Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples
B. A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set
C. Grade A has the lowest sample Mean of the 3 samples
D. Grade A has a higher sample Mean than Grade B
View answer
Correct Answer: C
Question #37
For the data set shown here which of these statements is/are true?
A. Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples
B. A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set
C. Grade A has the lowest sample Mean of the 3 samples
D. Grade A has a higher sample Mean than Grade B
View answer
Correct Answer: C
Question #38
Upon completion and validation of an improvement to a process a Belt and the Project Team create a Control Plan that contains which of these?
A. Standard operating work description of the process change
B. Description of the monitoring system in place to assure continued compliance
C. Summary of the targeted critical metrics for process performance measurement
D. All of the above
View answer
Correct Answer: D
Question #39
Assessing process proportion as opposed to evaluating a process with respect to a set target can be done using which of these?
A. Process proportion equals some value range
B. Process proportion equals some desired value
C. Target is current
D. Proportion of the tail is equal
View answer
Correct Answer: B
Question #40
What conclusion is most correct about the Experimental Design shown here with the response in the far right column?
A. o factor has enough statistical confidence greater than 95% to have an impact on the response rate
B. onstant, Adv and Bev are the only factors statistically affecting the response rate with 95% confidence or more
C. f the Adv is increased from the low level to the high level, the response rate increases
D. he response level is statistically concluded to only need the Adv and Bev factors set at the low level to get the largest response rate
E. his design does not have enough experimental runs to conclude anything as evidenced by the lack of P-values in the MINITABTM output
View answer
Correct Answer: D
Question #41
For a Normal Distribution as samples size increases the Range in Mean and Standard Deviation decrease relative to the Mean and Standard Deviation of the population.
A. rue
B. alse
View answer
Correct Answer: A
Question #42
Which statement(s) are incorrect for the Regression Analysis shown here? (Note: There are 2 correct answers).
A. The air-fuel ratio explains most of the TurbineOutput variation
B. The Regression explains over 98% of the process variation
C. This Multiple Linear Regression has three statistically significant independent variables
D. If the air-fuel ratio increases by 1, the TurbineOutput more than triples
E. The SteamExitTemp explains the most variation of the TurbineOutput
View answer
Correct Answer: DE
Question #43
The English words used for the 5S's are Sorting, Straightening, _____________ , __________ and Sustaining. (Note: There are 2 correct answers).
A. Shaping
B. Shining
C. Standardizing
D. Signing
View answer
Correct Answer: BC
Question #44
Upon completion and validation of an improvement to a process a Belt and the Project Team create a Control Plan that contains which of these?
A. Standard operating work description of the process change
B. Description of the monitoring system in place to assure continued compliance
C. Summary of the targeted critical metrics for process performance measurement
D. All of the above
View answer
Correct Answer: D
Question #45
The relationship between a response variable and one or more independent variables is investigated and modeled by use of____________________.
A. X-Y Matrix
B. Baldridge Assessment
C. Analysis of Variance (ANOVA)
D. Critical X's Definition
View answer
Correct Answer: C
Question #46
Which statement(s) are correct about the DOE Factorial plot output here? (Note: There are 3 correct answers).
A. Two factors were operated at 3 levels each
B. The highest tool age was achieved with metal hardness at high level while keeping the cutting speed at the low level
C. The design indicated above is a 32 factorial design
D. The cutting speed and cutting angle are at the low level for the least tool age achieved
E. All factors had 2 levels in the experiment
View answer
Correct Answer: BCE
Question #47
A Lean Six Sigma project is attempting to reduce inventory days. The Process Capability will be monitored as part of the Control Phase to track the sustainability of the improvement. Which distribution type is best used for performing the Capability Analysis?
A. Weibull Distribution
B. Normal Distribution
C. Exponential Distribution
D. Logistic Distribution
E. Gaussian Distribution
View answer
Correct Answer: A
Question #48
For the data set shown here which of these statements is/are true?
A. Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples
B. A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set
C. Grade A has the lowest sample Mean of the 3 samples
D. Grade A has a higher sample Mean than Grade B
View answer
Correct Answer: C
Question #49
The relationship between a response variable and one or more independent variables is investigated and modeled by use of____________________.
A. X-Y Matrix
B. Baldridge Assessment
C. Analysis of Variance (ANOVA)
D. Critical X's Definition
View answer
Correct Answer: C
Question #50
Control Charts were developed by Dr. Shewhart to track data over time. To detect Special Cause variation the Control Charts use which of these?
A. ata shift analysis
B. utlier analysis methods
C. enter Line and Control Limits
D. one of the above
View answer
Correct Answer: C

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