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Six Sigma Course Practice Test Q&As 8

Question: Which of the following are instances when you would use the Hypergeometric distribution?
  When the sample size is less than 10% of the population size
  When sampling without replacement
  When the number of defined occurrences (or "successes") is unknown
  All of the above

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When the sample size is less than 10% of the population size

Question: What is unique about the bivariate distribution?
  It is only used with discrete data.
  The variables must be independent.
  It is the joint distribution of two variables.
  Its graph is always two-dimensional.

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It is the joint distribution of two variables.

Question: The 7 Management tools were developed by:
  Toyota
  Deming
  Nayatani
  Ishikawa

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Nayatani

Question: The Define phase is the first phase of Six Sigma’s DMAIC cycle. If this phase is not planned for and carried out thoroughly, a project may stall and not transition to other phases successfully. Which of the following statements is well-defined?
  launch a CEO nationwide recruitment campaign
  improve employee morale by increasing cooperation
  encourage vendors to pay their invoices on time by threatening legal action
  reduce the reject rate of service B from 30% to 10% within 2 calendar years

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reduce the reject rate of service B from 30% to 10% within 2 calendar years

Explanation : ‘Reduce the reject rate of service B from 30% to 10% within 2 calendar years’ is a well-defined project statement.
Well-defined project statements are important in that they present a concrete goal that that has a time limit and a measurable outcome. In this example, a period of 2 years provides a guideline for employees to plan their activities to reach this goal while the percentage reduction of 20 is a measurable goal.

Question: The Full Analytical Criteria Prioritization Matrix is derived from what process?
  Taguchi's robust design process
  Saaty's Analytical Hierarchy Process (AHP)
  Ishikawa's 6 Ms
  Shewhart's PDCA process

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Saaty's Analytical Hierarchy Process (AHP)

Question: If you were to roll a single die 10 times, the result of each roll would be __________.
  Mutually exclusive of the other nine rolls
  Proportional to the other nine rolls
  Independent of the other nine rolls
  Dependent upon the other nine rolls

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Independent of the other nine rolls

Question: At the beginning of a Six Sigma project, who is responsible for identifying a high-impact, low-performing process in need of improvement
  Project Champion
  Master Black Belt
  Management/Process Management Control
  Quality Leader

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Management/Process Management Control

Question: Weldman Industries conducts a survey which shows that their average production cycle time is 128 minutes with a sampling error of 3 seconds. What does a sampling error result from?
  making inferences about a large sample
  making inferences about a large population
  using a population instead of a sample
  using a sample instead of a population

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using a sample instead of a population

Explanation : A sampling error results from using a sample instead of a population.
A sampling error occurs from using a sample to collect date instead of a population to estimate a population parameter. For example, if a company uses a sample of 50 employees (out of a total population of 600), then a sampling error would occur as the estimate can only approximate the population parameter. In general, a sampling error can be reduced by choosing a large, representative sample from which to collect data.

Question: Sam’s research at a local manufacturing company is examining the efficiency of a new machine in detecting design failures. To present evidence to his supervisors that the machine is indeed effective, he must accept or reject the null hypothesis. According to the image below, what does the region of non-rejection imply?
  Accept the alternate hypothesis
  Reject the null hypothesis
  Accept the null hypothesis
  Reject the alternate

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Accept the null hypothesis

Explanation : The region of non-rejection in a distribution leads to the acceptance of the null hypothesis.

According to Sam’s research, the null hypothesis will state that the new machine does not detect design failures. If his data analysis falls within the region of non-rejection as shown above, then his research conclusion is to accept the null hypothesis.

Question: Thinking of the process mapping steps defined in the lecture, which of the following must be performed first?
  Define the number of decision points in the process
  Clearly define the boundaries of the process
  Identify all the inputs to each process step
  Identify all the outputs of each process step

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Clearly define the boundaries of the process

Question: What is the only variable that determines the width of the control limits of the averages portion of the x-bar, R chart?
  D 4
  R-bar
  A 2
  None of the above

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R-bar

Question: You are operating a concession stand selling hamburgers, hot dogs, french fries, and fountain drinks. Your processes are designed to prepare all food items to the proper internal temperature with a desirable external appearance. Which of the following items would you most likely deem as defective?
  An undercooked hamburger
  A batch of unevenly browned french fries
  An underweight hamburger
  A fountain drink with excess ice
  All of the above

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An undercooked hamburger

Question: In the House of Quality, the lower level/foundation is used to
  List the actions your organization will take to satisfy your customers (known as the "hows")
  Compare your organization to the competition
  Rank the "hows"
  Make notes about customer "wants"

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Rank the "hows"

Question: What is House of Quality?
  A tool to translate what the customer wants into products or services that meet the customer wants.
  A conflict resolution process used to settle disputes between customer requirements and the design specs.
  A statistical technique that compares the cost of customer requirements to the projected budget.
  A lean engineering tool that looks for ways to improve quality without increasing development time.

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A tool to translate what the customer wants into products or services that meet the customer wants.

Question: The purpose of process mapping is to help team members and others within the process to understand the
  Meaning of the VOC
  Process
  Six Sigma level of performance
  Goals of the business

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Process

Question: The project charter should establish ________ for the team.
  Boundaries
  Motivation
  Focus
  All of the above

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Focus

Question: When flowcharting a process, which symbol is used to identify a decision?
  Diamond
  Square
  Oval
  Rectangle

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Diamond

Question: Teams undergo several stages in their growth. During the storming stage, team members:
  struggle to understand their roles
  argue for domination of discussions
  express their own ideas and opinions
  reach a consensus on how to complete project

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express their own ideas and opinions

Explanation : During the storming stage, team members express their own ideas and opinions.

Teams undergo several stages of growth before they function as a cohesive and productive unit. The third stage of this development is referred to as storming. During storming, team members express their own ideas and opinions which are often in disagreement with one another.

Question: What is an advantage of focus groups as a method of gathering data about customers?
  You can read body language
  The halo effect
  The devil effect
  None of the above

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You can read body language

Question: Unlike other quality improvement philosophies, Six Sigma is comprised of three key elements:
  Strategy, competition, and evolution
  Technology, evolution, and customer focus
  Strategy, tactics, and culture
  Tools, techniques, and quality circles

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Strategy, tactics, and culture