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IASSC LSSGB Exam: Questions With Complete Solutions
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IASSC LSSGB Exam: Questions With Complete SolutionsIf the chance that any one of five telephone lines is busy at any instant is 0.01,
then what is the probability that all the lines are busy?
A. (0.01)^4
B. (0.01)^5
C. (0.01)^6
D. (0.01)^10 Right Ans - B. (0.01)^5
N = 5, p = 0.01, x = 5 Apply Standard formula for Binomial Distribution. Thus,
option b is the correct answer.
Who should complete the control phase after the successful completion and
implementation of the first four phases of DMAIC?
A. The green belt alone; the project has been successfully completed.
B. The process owner alone; it is his responsibility to take the project from
here.
C. The process owner and the Green Belt together should complete the control
phase.
D. The complete team is the most desirable option. Right Ans - D. The
complete team is the most desirable option.
The control phase should be completed by the entire team. Control is not an
insignificant phase of the DMAIC process. The green belt or the process owner
alone may not have the ability and knowledge to structure the last control
step. So option d is correct.
To increase the power of the experiments, what is the best choice in the hands
of a Six Sigma team?
A. Increase Sample Size
,B. Reduce Sample Size
C. Reduce Significance level
D. All of the above Right Ans - A. Increase Sample Size
Options b and c are not serious considerations, and thus option d can be ruled
out. Conceptually, increase in sample size increases the possible accuracy of
the experiment, and thus an increase in power. So, option a is the correct
answer.
Hypothesis testing is usually done to:
A. Statistically validate if a sample mean belongs to the population
B. Statistically validate if means of two groups are the same or if they are
significantly different
C. Statistically validate if variances of two groups are the same or if they are
different.
D. All of the above Right Ans - D. All of the above
Statistically validate if a sample mean does belong to the population, find if
means of two groups are the same or if they are significantly different, and
validate if variances of two groups are the same or if they are different. Option
d is the correct answer.
What is the concept behind PDCA?
A. The Deming/Shewhart cycle
B. Process flow
C. Continuous improvement
D. Satisfying suppliers Right Ans - C. Continuous Improvement
The key question phrase is "concept behind." Option b is inappropriate and
does not fit the question. Option a would be correct if the question requested
another name for PDCA. Answer option d could be one of the number of
,potential positive outcomes of this activity. However, the concept behind and
objective of PDCA is that of continuous improvement.
What are the six experiments called while performing one experiment with
five repetitions?
A. Randomization
B. Replications
C. Planned grouping
D. Sequential Right Ans - B. Replications
Repeated trials or replications are often conducted to estimate the pure trial-
to-trial experimental error so that lack of fit may be evaluated. Randomization
frees an experiment from the environment and other biases. Sequential
experiments are conducted one after another, not all at the same time.
Adjustments may be made in the experimentation based upon the knowledge
obtained. Almost any DOE contains planned grouping. So answer option b is
correct.
Which type of chart is used for small shifts in variation?
A. Xbar
B. p
C. c
D. CUSUM Right Ans - D. CUSUM
The other charts are traditional control charts that are designed to identify
significant shifts in process variation, while the CUSUM chart is designed to
show small variation shifts
What are the distinct types of variation that are noted down in control charts?
A.Special and assignable
B. Random and chance
C. Chance and assignable
D. Normal and random Right Ans - C. Chance and assignable
, Chance and assignable are the two varieties of variation. Chance variation is
also referred to as normal or random (among others). Assignable variation is
also called special or non-normal. So option c is correct.
Which of the following is an advantage of the production of a product in large
lots?
A. Machine efficiencies
B. Customer delivery lead times
C. Product transportation
D. Product quality Right Ans - A. Machine efficiencies
According to the proponents of lean manufacturing and continuous flow,
options b, c, and d are all disadvantages. For large lot processing delivery lead
times increases, transportation of products increases, and products have more
potentiall for damage. Option a is generally recognized as the main advantage
of large batch runs that may be more than offset by the disadvantages. So
option a is the correct choice.
A sample is to a statistic as a population value is to a:
A. Sample
B. Unit
C. Parameter
D. Measurement Right Ans - C. Parameter
A statistic is derived from a sample. A parameter is derived from a population.
So option c is correct.
A calculation for reproducibility results in a value of 0 (zero), while
repeatability yields a positive number. Without any other considerations,
what conclusion can be made regarding the reproducibility result?
A. The number of distinct categories is small compared to the appraiser
variation.
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