Lean six sigma Green belt test questions

The charting of a data set in which most of the data points are concentrated around the average (mean), thus forming a bell-shaped curve.

normal distribution

Which of the following control charts is used to monitor discrete data? (8)

p

A graphical tool for ranking causes from most significant to least significant.

pareto chart

A set or collection of objects or individuals. It can be the corresponding set of values that measure a certain characteristics of a set of objects or individuals

population

A definition of the possible outcomes of interest from a given experiment.

random variable

Which of the following is the key objective of a six sigma project? (14)

reducing variation in critical processes

The chance of making a right or wrong decision.

risk

A set of values or items selected from some population.

sample

The number of units in a sample.

sample size

For a set of data, the average squared deviation from the mean, with a denominator of n-1.

sample variance

Provides relationship between two variables, and provides a visual correlation coefficient.

scatter diagram

A methodology that provides businesses with the tools to improve the capability of their business processes.

six sigma

The use of basic graphical and statistical methods for analyzing and controlling the variation of a process, and thus continuously improving the process.

statistical process control

Which of the following is an example of mistake-proofing? (13)

using color coding as an error signal

Which of the following is a commonly accepted level for alpha risk? (11)

0.05

A procedure whereby one or two mutually exclusive and exhaustive statements about a population is concluded. Information from a sample is used to infer something about a population from which the sample was drawn.

hypothesis testing

Arithmetic average of a set of values

mean

For a normal distribution, two standard deviations on each side of the mean would include what percentage of the total population? (10)

95%

Which of the following tools is used to translate broad requirements into specific requirements? (6)

A critical to quality tree (CTQ)

Data coming basically from GO/NO-GO, pass/fail determinations of whether units conform to standards.

Attribute data

When the sampling method used creates a difference between the result obtained from the sample and the actual population value, the difference is known as (12)

Bias

Which of the following tools is used extensively in quality function deployment (QFD)?(7)

Matrix Diagram

Which of the following measures is increased when process performance is improved? (3)

Capability Index

Which of the following measures is used to show the ratio of defects to units? (16)

DPU

In order for value flow analysis to be effective, a team must take which of the following steps first? (19)

Define the value stream

The statistics that summarize a population are referred to as (1)

Descriptive Statistics

Inputs to a process that can be manipulated during experimentation

Factors

A systematic group of activities intended to recognize and evaluate the potential failure of a product/process and the effects of that failure.

Failure mode and effects analysis

The middle value of a data set when the values are arranged in either ascending or descending order.

Median

The value occurring most frequently in a data set.

Mode

Which of the following terms is used to describe the risk of a type I error in a hypothesis test? (17)

Level of Significance

A correlation analysis is used to provide a numeric value for which of the following types of relationships between two variables? (5)

Linear

The critical path for a project is best described as the (21)

Longest path from the start to the completion of the project

Positional, cyclical, and temporal variations are most commonly analyzed in (18)

Multi-variable charts

Which of the following shapes is used to present a termination point in a flowchart? (9)

Oval

Which of the following tools can be used to identify and quantify the source of a problem? (4)

Pareto Chart

The measure of the likelihood of a given event occurring

Probability

Which of the following tools is used to identify potential events and contingencies for an implementation plan? (15)

Process decision program chart

An advanced flowcharting method, identifying the process input variables "x" and the relationship to the process output variables "y".

Process map

One of the most common measures of variability in a data set or population.

Standard Deviation

Statistical process control (SPC) is best defined as the use of (23)

Statistical methods to understand and control a process

When calculating the Cp index, what does the standard deviation represent in the formula Cp= USL-LSL/6σ (25)

The range of the process

Concerning the values of a variable, as opposed to attribute data. A dimensional value can be recorded and is only limited in value by the resolution of the measurement system.

Variable data

When an inspection process rejects conforming product, what type of error is being made? (20)

a

The probability of accepting the alternative hypothesis (H1) when the null hypothesis (Ho) is true.

alpha risk

An improvement process in which a company measures its performance against that of best-in-class companies, determines how those companies achieved their performance levels, and uses the information to improve its own performance.

benchmarking

The probability of accepting the null hypothesis (Ho) when the alternative (H1) is true.

beta risk

A pictorial diagram showing possible causes (process inputs) for a given effect (process outputs). It is also referred to as the "Ishikawa diagram" or "fishbone diagram."

cause and effect diagram

A simple data recording device, custom designed by the user, which allows them to interpret the results.

check sheet

Range which a parameter that a population may be expected to fall, on the basis of measurement, with some specific confidence level or confidence coefficient.

confidence interval

Basic tool of statistical process control. It consists of a run chart, together with statistically determined upper and lower control limits and a centerline.

control chart

A document that describes the required characteristics for the quality of a product or service, including measures and control methods.

control plan

A branch of applied statistics dealing with planning, conducting, analyzing, and interpreting controlled tests to evaluate the factors that control the value of a parameter or group of parameters.

design of experiments

Countable observations, for example, number of defects.

discrete data

Possible results of a random experiment.

elementary outcomes

A measurement system analysis is designed to assess the statistical properties of (24)

gage variation

A bar chart that depicts the frequencies of numerical or measurement data.

histogram