LSSGB Week 5
An attribute agreement analysis is a measurement system analysis for continuous data. True False
False
Effectiveness measures focus on what the product or service looks like for the business True False
False
High standard deviation represents a tightly controlled process. True False
False
If you have attribute data, the metric of central location is the mode. True False
False
More frequent sampling will lead the project team to a better solution. True False
False
Randomizing the samples is not necessary to obtain an accurate measurement of repeatability. True False
False
Sampling and stratification are the same thing. True False
False
Sampling events must occur within individual subgroups. True False
False
When calculating report with producibility, you should only use the most experienced inspectors. True False
False
Inferential statistics make inferences about a population from a sample. True False
True
Infrequency, plot, check she is used to record a measure of an item along a scale or continuum. True False
True
It is best to perform data stratification before the data are collected. True False
True
It is good practice to perform systematic sampling within subgroups of data. True False
True
Joe owns a golf cart rental company. When a golf cart is returned, he uses a simple, black-and-white picture of the golf cart from all angles and marks were damage has occurred. This is an example of using a concentration diagram check sheet. True False
True
Judgment sampling, guarantees a bias and should be avoided. True False
True
Linearity is a measure of how the size of the part affects the accuracy of the measurement system. True False
True
Measuring systems analysis (MSA) determines if a measuring system can generate accurate and precise data, and if that data is adequate to obtain your objectives. True False
True
Repeatability is the variation due to the measuring device. True False
True
Reproducibility is the variation due to appraiser variation. True False
True
Resolution is related to the number of distinct categories and variable gage R and R. True False
True
Resolution is the capability to differentiate between samples to the extent necessary to make a decision. True False
True
Sampling involves taking data from a subset of a larger group. True False
True
Stability is a measure of how accurately the system performs over time. True False
True
Stability is the total variation obtained with a particular device, on the same part, when measuring a single characteristic over time. True False
True
Standard deviation can be used to describe the variation of normal and non-normal data. True False
True
The equation to calculate range is: Range=x (largest data point) - x (smallest data point) True False
True
The measurement device you were using for your Greenbelt project has shown increased variation overtime. This is an example of poor stability. True False
True
The mode is the most frequently occurring the value of a data set. True False
True
The smaller, the standard deviation, the more robust the process. True False
True
Typically, you said your confidence level at 95%. When you said it at 90% your confidence intervals become tighter. True False
True
When calculating reproducibility, you should use inspectors with varying experience. True False
True
When using the stratified sampling method, it is acceptable to divide data into sub groups and then randomly sampled within those groups. True False
True
When using the stratified sampling method, it is acceptable to divide data into sub groups, and then randomly sample within those groups. True False
True
When you are unable to measure the entire population, you typically take a sample to represent the population. True False
True
Wiley data sheet should be kept simple, it is a good idea to follow up with the person collecting data to be sure they understand. True False
True
A data sheet is used to capture the location of the defects. True False
False
A random event is the act of extracting items from the population or process to measure. True False
False
In this data set (3,4,5,6 and 7), the mean, and median are the same. True False
True
A good measurement system should be both accurate and precise. True False
True
After randomly selected samples from a population are measured, the resulting data are analyzed to produce descriptive statistics. True False
True
An example of poor linearity is when the measured samples are higher than the standard at the low end of the range, and lower than the standard at the higher end of the range. True False
True
Appraisers measure the same parts in a different order multiple times to capture repeatability of the test. True False
True
Appraisers reevaluate the same parts in a different order to capture repeatability of the test. True False
True
Attribute/discrete data summarize the frequency with which an event occurs. True False
True
Bias is a measure of the bias in the measurement system. True False
True
Bias is the difference between observed average measurement and true or standard value. True False
True
Both judgment and convenience, sampling, or not great sampling methods. True False
True
Convenience sampling involves sampling, the items that are easiest to measure or sampling at times that are most convenient. True False
True
Due to the high cost of collecting data, a black belt recommends collecting a smaller, initial sample of data to save time and money. Is this a good initial solution? True False
True
Examples of an efficiency measure would be those used to reduce cycle time and wait time in lean methodology. True False
True
In a statistical study, population refers to the entire set of objects, individuals, or measurement items defined by the scope of the study that exhibits a particular characteristic. True False
True
Which of the following types of data represent continuous data? a) call, duration, lead time, and temperature b) pass/fail and true/false c) survey data with five possible responses d) all of the above
a) call, duration, lead time, and temperature
Inferential statistics are used to determine___________ a) conclusions that extend beyond existing data b) exact cause-and-effect relationships c) judgements about what employees are doing in the process d) all of the above
a) conclusions that extend beyond existing data
In a six sigma project, the Ys is the project's _____ you are trying to _____. a) output, improve b) factors, influence c) Xs,control d) factors, improve
a) output, improve
A defect or cause sheet is used to ______ a)record types of defects or causes of defects b) capture, readings, measures, or counts c) record a measure of an item along a scale or continuum d) travel through the process along with the product
a) record types of defects or causes of defects
When you have the operator measure the sample only one time, you are unable to calculate _____ a) repeatability b) bias c) reproducibility d) precision
a) repeatability
Critical Xs are determined by using _____ tools. a) statistical b) Six Sigma data c) improve phase d) detailed measurement
a) statistical
Brad is collecting a sample of every 100th item produced on an assembly line. This is an example of _______ a) systematic sampling b) stratified sampling c) judgment sampling d) error proofing
a) systematic sampling
What is the range of this data set: 3,4,5,6,7 a) 2 b) 4 c) 3 d) 1
b) 4
When determining a significance level for a hypothesis test, Marsha decides that her acceptable alpha risk is 10%. What is the confidence level? a) 10% b) 90% c) significant d) insignificant
b) 90%
In order to measure repeatability, how many times must an inspector measure the same part? a) at least 6 b) at least 2 c) at least 3 d) at least 4
b) at least 2
Sampling bias in the data collection is the risk of_______ a) taking too much data in a population b) collecting data not representative of a population c) using an inaccurate gauge d) all of the above
b) collecting data, not representative of a population
Which two types of data are utilized in lean six sigma projects? a) hard and soft b) continuous and discrete c) concrete and ambiguous d) defective, and non-defective
b) continuous and discrete
Which of the following types of data represented discrete data? a) call, duration, lead time, and temperature b) pass/fail and true/false c) survey data with five possible responses d) both b and c
b) pass/fail and true/ false
You plan to reduce the variation in your process. Which of the following are you trying to improve? a) mean b) standard deviation c) median d) mode
b) standard variation
Brad wants to collect data and each step in the process. He has decided that a good way to collect data as a part flows through the cleaning phase of the process is to put a data collection sheet in the crate in which the part travels. This is an example of using what? a) common sense b) traveler check sheet c) stratified checklist d) common causes
b) traveler check sheet
Repeatability is the __________ a) change in measurements over time b) variation in measurements of the same unit by the same person c) closeness of a measurement to the actual value d) variation in measurements of the same unit by different employees or devices
b) variation in measurements of the same unit by the same person
What is the minimum number of distinct categories necessary to pass a variable gage r & r? a) 2 b) 12 c) 5 d) 3
c) 5
When determining a significance level for a hypothesis test, Bob determines that is acceptable alpha risk is 3%. What is the confidence level? a) 3% b) 5% c) 97% d) insignificant
c) 97%
_________ are used to display descriptive statistics. a) Histograms b) Run charts c) Both a and b d) None of the above
c) Both a and b
When an inspector consistently measures higher than the standard, is an example of _______ a) precision b) repeatability c) bias d) linearity
c) bias
The Analyze Phase of the DMAIC Six Sigma project can include ___________ a) statistical analysis b) graphical analysis c) both a and b d) neither
c) both a and b
Joe owns a golf cart rental company. When a golf cart is returned, he uses a simple, black and white picture of the golf cart from all angles and marks where damage has occurred. This is an example of using a...... a) scatter plot b) defect diagram c) concentration diagram check sheet d) traveler check sheet
c) concentration diagram check sheet
For symmetric data, which of the following is true? a) mode>mean>median b) mode<mean<median c) mode=mean=median d) none of the above
c) mode=mean=median
Bills boss is skeptical of the choice to use random sampling as he wants to ensure the "right" data or chosen for the analysis. Which of the choices below is the best message that bill can communicate to his boss to explain what this method is all about? a) random sampling will ensure the desired outcomes are achieved b) this sampling method will produce the results that his boss wants c) random sampling, ensures, that every item in the population has an equal chance of being selected d) none of the above
c) random sampling ensures, that every item in the population has an equal chance of being selected
When you have only one operator, measuring samples, you were unable to calculate ______ a) repeatability b) bias c) reproducibility d) precision
c) reproducibility
Brads management team is concerned that it will take a lot of time and money to collect the data. To help with the situation, a solid recommendation could be _____ a) not to sample anything at all b) to sample all of the items c) to put a plan together for the sampling events d) none of the above
c) to put together a plan for the sampling events
Which of the following types of data represent continuous data? a) item counts of limited data sets b) late/on time c) weight d) all of the above
c) weight
In-process measures are _____ a) Ys and are not controllable b) inputs that are coming into the process c) x measures taken within the steps of the process d) lagging indicators
c) x measures taken within the steps of the process
Data stratification __________ a) search is the data in various buckets to identify patterns b) helps identify patterns by "slicing and dicing" the data C) uses categories, lake region, time of day, department, and location d) all of the above
d) all of the above
The range of a set of observations (data distribution) is _____ a) the difference between the largest observation and the smallest observation b) a very basic (crude) measure of variability c) very simple to calculate: Range = x (largest data point) - x (smallest data point) d) all of the above
d) all of the above
Which of the following are measures used to describe the center of the data set? a) median b) mean c) mode d) all of the above
d) all of the above
Which of the following graphs are found in a gage r & r study? a) gage run chart and bar chart b) XBar amd R (control charts) c) scatter plots d) all of the above e) only a and b
d) all of the above
I want to put measures are referred to as Y data measures and quantify the overall performance of the process, including how well ________ a) the customer needs and requirements are met (quality and speed) b) the companies needs and requirements are met (cost and speed) c) the process meets the six sigma level targets D) both a and B
d) both a and b
A defect or cause check sheet is a.... a) measure of items along a continuum b) pictorial representation of the location of defects c) list of details by process step d) count of defects by type
d) count of defects by type
________ shores every item in the population of process has an equal chance of being selected for counting. a) stratified sampling b) random chance c) a sampling plan d) random sampling
d) random sampling
A car repair shop wants to collect data and information on its oil change process. It decides to send a sheet with the vehicle as its oil is changed for this purpose. This is an example of using which tool below? a) stratified checklist b) Fishbone c) stratification d) traveler check sheet
d) traveler check sheet
Accuracy is broken down into ____ a) linearity b) repeatability c) bias d) stability e) a, c, and d
e) a, c, and d
Precision can be broken down into _____ a) reproducibility b) repeatability c) bias d) stability e) both a and b
e) both a and b
