SIX SIGMA GREEN BELT CORE EXAM SET 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔control charts - ✔✔show process variation while work is underway
- used to determine natural range of process and compare it with specified tolerance
range
✔✔special (assignable) variation - ✔✔NOT inherent in the process
✔✔common (chance) variation - ✔✔variability due to common or chance causes
inherent in process
- must change system to solve
✔✔Benchmarking - ✔✔a process by which a company compares its performance with
that of high-performing organizations
✔✔competitive benchmarking - ✔✔The comparison of an organization's processes with
those of competing organizations
✔✔functional benchmarking - ✔✔benchmarking in which the examples are drawn from
any organization, even those outside the industry
✔✔Gantt Chart - ✔✔tool for monitoring and managing a project
- lists all of the tasks and subtasks in the order in which they will be done
✔✔Interrelationship Diagram - ✔✔team brainstorming tool to show cause and effect
relationships
- usually used to understand complex relationships
✔✔Process Capability - ✔✔capability of a process to meet customer requirements
consistently
✔✔swim lane diagram - ✔✔A type of process flow diagram that features divisions or
"lanes." Each lane is assigned to an actor or even a phase or stage in a process, that is
responsible for the activity or work described in the lane
✔✔Spaghetti Diagram - ✔✔A visual depiction of the actual flow of people, paper,
material or information in a work process.
✔✔discrete data - ✔✔set of numbers where only certain numbers are possible
(counting)
✔✔continuous data - ✔✔set of numbers with all values in between
, ✔✔probability - ✔✔how we measure likelihood of something random occurring
✔✔event (in probability) - ✔✔any collection of outcomes from a probability experiment
✔✔mutually exclusive events - ✔✔two or more events are said to be mutually exclusive
if occurrence of any one of the events excludes the occurrence of others
- events cant occur simultaneously
✔✔independent events - ✔✔if occurrence of one event does not change the probability
of another event occurring, the two events are independent
✔✔permutation - ✔✔ordered arrangement of distinct objects
✔✔combination - ✔✔taking a group of items and not putting them in order
✔✔Control Limit Theorem - ✔✔enables us to go from discipline statistics to interferential
statistics
- bridge between descriptive and inferential statistics
✔✔population - ✔✔complete set of items
✔✔sample - ✔✔subset of population that data was collected on
✔✔statistic - ✔✔value calculated from a sample, such as the mean of a sample
✔✔parameter - ✔✔value calculated from a population, such as population variance
✔✔descriptive statistics - ✔✔collecting, organizing, summarizing, and presenting data
✔✔interferential (analytical) statistics - ✔✔taking sample data and using it to make
inferences or predictions
✔✔probability distribution - ✔✔mathematical function that provides probability of
occurrences of different possible outcomes in an experiment
✔✔symmetric distribution - ✔✔mean is equal to median and two sides of mean are
mirror images
✔✔left skewed distribution - ✔✔curve is asymmetric with a tail to the left because mean
is less than median
✔✔right skewed distribution - ✔✔curve is asymmetric with a tail to the right because
mean is greater than median
QUESTIONS AND SOLUTIONS RATED A+
✔✔control charts - ✔✔show process variation while work is underway
- used to determine natural range of process and compare it with specified tolerance
range
✔✔special (assignable) variation - ✔✔NOT inherent in the process
✔✔common (chance) variation - ✔✔variability due to common or chance causes
inherent in process
- must change system to solve
✔✔Benchmarking - ✔✔a process by which a company compares its performance with
that of high-performing organizations
✔✔competitive benchmarking - ✔✔The comparison of an organization's processes with
those of competing organizations
✔✔functional benchmarking - ✔✔benchmarking in which the examples are drawn from
any organization, even those outside the industry
✔✔Gantt Chart - ✔✔tool for monitoring and managing a project
- lists all of the tasks and subtasks in the order in which they will be done
✔✔Interrelationship Diagram - ✔✔team brainstorming tool to show cause and effect
relationships
- usually used to understand complex relationships
✔✔Process Capability - ✔✔capability of a process to meet customer requirements
consistently
✔✔swim lane diagram - ✔✔A type of process flow diagram that features divisions or
"lanes." Each lane is assigned to an actor or even a phase or stage in a process, that is
responsible for the activity or work described in the lane
✔✔Spaghetti Diagram - ✔✔A visual depiction of the actual flow of people, paper,
material or information in a work process.
✔✔discrete data - ✔✔set of numbers where only certain numbers are possible
(counting)
✔✔continuous data - ✔✔set of numbers with all values in between
, ✔✔probability - ✔✔how we measure likelihood of something random occurring
✔✔event (in probability) - ✔✔any collection of outcomes from a probability experiment
✔✔mutually exclusive events - ✔✔two or more events are said to be mutually exclusive
if occurrence of any one of the events excludes the occurrence of others
- events cant occur simultaneously
✔✔independent events - ✔✔if occurrence of one event does not change the probability
of another event occurring, the two events are independent
✔✔permutation - ✔✔ordered arrangement of distinct objects
✔✔combination - ✔✔taking a group of items and not putting them in order
✔✔Control Limit Theorem - ✔✔enables us to go from discipline statistics to interferential
statistics
- bridge between descriptive and inferential statistics
✔✔population - ✔✔complete set of items
✔✔sample - ✔✔subset of population that data was collected on
✔✔statistic - ✔✔value calculated from a sample, such as the mean of a sample
✔✔parameter - ✔✔value calculated from a population, such as population variance
✔✔descriptive statistics - ✔✔collecting, organizing, summarizing, and presenting data
✔✔interferential (analytical) statistics - ✔✔taking sample data and using it to make
inferences or predictions
✔✔probability distribution - ✔✔mathematical function that provides probability of
occurrences of different possible outcomes in an experiment
✔✔symmetric distribution - ✔✔mean is equal to median and two sides of mean are
mirror images
✔✔left skewed distribution - ✔✔curve is asymmetric with a tail to the left because mean
is less than median
✔✔right skewed distribution - ✔✔curve is asymmetric with a tail to the right because
mean is greater than median
