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
Show or Reveal the Answer
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.
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
Show or Reveal the Answer
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.
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
Show or Reveal the Answer
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.
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"
Show or Reveal the Answer
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
Show or Reveal the Answer
Focus
Question: When flowcharting a process, which symbol is used to identify a decision?
Diamond
Square
Oval
Rectangle
Show or Reveal the Answer
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
Show or Reveal the Answer
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.
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
Show or Reveal the Answer
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
Show or Reveal the Answer
Strategy, tactics, and culture
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