CLSSBB GAQM Certified Lean Six Sigma Black Belt (CLSSBB) Free Practice Exam Questions (2025 Updated)
Prepare effectively for your GAQM CLSSBB Certified Lean Six Sigma Black Belt (CLSSBB) certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.
Find the value of m or b1:
Which of the following techniques can be used in regression analysis to reduce higher-order terms in the model?
This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 7?
An x-bar and R chart has four part measurements per sample. The control limits on the averages chart are 2.996 and 3.256. Assume the process data form a normal distribution. What is the probability that the next plotted point falls outside the control limits?
Typically, which of the following actions is NOT used to reduce process cycle time?
The essence of Lean is to concentrate effort on removing variation from a process output while lowering cost. (True/False)
The time for a fail-safe device to trip is thought to be a discrete uniform distribution from 1 to 5 seconds. To test this hypothesis, 100 tests are conducted with results as shown below.
On the basis of these data, what are the chi square (χ2) value and the number of degrees of freedom (df)?
x2df
Find the upper control limit for a range chart if n = 4 and the average range is 2.282.
= 2.282 x 2.282 = 5.208
Customers make a purchase decision based on a number of factors. In Lean Six Sigma we refer to these decision points as CTQ's which stands for __________.
Following is the 80/20 principle
The leader in the quality movement who recommended that organizations “eliminate numerical quotas for the work force and numerical goals for management”:
A population of size 1,000,000 has mean 42 and standard deviation 6. Sixty random samples, each of size 15 are selected. According to the Central Limit Theorem the distribution of the sixty sample means has a mean of approximately:
Samples of size n=36 are randomly selected from a population with mean μ = 125 and variance 12. Find the variance of the distribution of sample means.
Perform a risk analysis to determine the expected profit or (loss) from a project which has four possible disjoint outcomes:
Outcome A shows a profit of $340,000 and has a probability of 0.25.
Outcome B shows a profit of $120,000 and has a probability of 0.40.
Outcome C shows a loss of $40,000 and has a probability of 0.10.
Outcome D shows a profit of $100,000 and has a probability of 0.25.
A random sample of 2500 printed brochures is found to have a total of three ink splotches. The rate of ink splotches in PPM is:
The principle disadvantage of fractional factorial experiments is that:
A team wants a technique for improving consistency of assembly operations. They should use:
Is it safe to assume that the interaction effects are negligible?
The primary metric for a project is reduced cost for process A. Baseline data might include:
Find the value of (1) in the ANOVA table. Assume:
