# FREE ASQ Six Sigma Green Belt Questions and Answers

#### What percentage of the population would fall inside the two standard deviations on either side of the mean for a normal distribution?

For a normal distribution, approximately 95% of the total population falls within two standard deviations on each side of the mean. This is known as the "Empirical Rule" or the "68-95-99.7 Rule," which is a statistical rule of thumb that applies to data that follows a normal distribution.

#### The best definition of statistical process control (SPC) is the application of

Statistical Process Control (SPC) is best defined as the use of statistical methods to understand and control a process. SPC is a powerful quality management technique that involves monitoring and analyzing process data to ensure that the process is stable, predictable, and capable of producing products or services that meet specified quality standards.

#### A population's statistical data are referred to as

Descriptive statistics are the statistics that summarize and describe the main features of a population or a dataset. They provide a concise and meaningful way to understand the central tendencies, variability, and distribution of the data.

#### Which control chart from the list below is used to track discrete data?

I & mR control charts are a type of control chart used in statistical process control (SPC) to monitor processes over time. They are particularly suitable for monitoring processes where individual data points are collected, rather than continuous data. Attribute data consists of data that can be categorized into discrete categories or counted, such as pass/fail, yes/no, or the number of defects in a sample.

#### What tool is used to identify potential events and backup plans for an implementation strategy?

Process Decision Program Chart (PDPC) is a tool primarily used in the planning phase of a project or implementation plan. Its purpose is to identify potential events or problems that may occur during the execution of a plan and to develop corresponding contingencies to address those events.

#### Which of the following shapes represents a flowchart's termination point?

In a flowchart, oval shapes are typically used to represent the starting point or the termination point of a process or decision.

#### Which Six Sigma function is most likely to respond if a specific circumstance in a company calls for the elimination of organizational barriers and making sure the team has the right resources?

• Champion

• Process Owner

• Change agent

• Black Belt

#### Which of the following is among the various dispersion measures?

> Mode, Range, Standard deviation

> Range. Mean, Standard deviation

> Range, Variance, Standard deviation

> Variance, Mode, Standard deviation

#### When process performance is enhanced, which of the following measures is increased?

The capability index is a statistical measure that assesses the ability of a process to produce products or services within specified limits. It compares the spread of process variation to the allowed tolerance limits.

#### Which of the following metrics is used to display the defect-to-unit ratio?

DPU (Defects Per Unit) is a measure used to show the ratio of defects to units in a process. It is a key performance metric in quality management and process improvement efforts.

#### A passport-issuing organization began accepting requests for passport renewals through neighborhood post offices in outlying locations as a way to enhance its services. The post office clerks receive renewal requests, gather required paperwork and payment, and then submit finished forms to the passport authorities for processing. Which of the following best sums up the connection between the passport authority and the post offices?

• The post offices are internal customers of the passport authority

• The passport authority is a supplier to the post offices

• The post offices are external customers for the passport authority

• The passport authority is an external customer of the post offices.

#### When rating a service, respondents are given the options of poor, fair, good, very good, or outstanding. What kind of measurement scale does this serve as an example of?

Ordinal scales are valuable when it is difficult or impractical to establish exact numerical measurements, but you still want to capture respondents' preferences or perceptions in a ranked order. They provide valuable insights into the relative ranking or preference of items without requiring respondents to assign specific numerical values. However, when it comes to performing statistical analyses, ordinal data has limitations, as it lacks equal intervals between categories, and arithmetic operations like addition or subtraction are not meaningful. Therefore, it's crucial to use appropriate statistical methods when working with ordinal data.