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CSSBB Questions and Answers

Question # 6

The Lean toolbox includes all of these items except ________________.

A.

Mistake Proofing

B.

Visual Factory

C.

Design of Experiments

D.

Inventory Management

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Question # 7

As a means of measuring the effects on other areas of a process as a result of changes in the primary metric we also define and track ________________.

A.

Parallel process metrics

B.

Secondary metrics

C.

Tertiary metrics

D.

Industry standards

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Question # 8

Data that can be measured on a continuum and has meaningful decimal subdivisions are __________ data.

A.

Continuous

B.

Surplus

C.

Discrete

D.

Variable

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Question # 9

Which statement(s) are correct about the Regression shown here? (Note: There are 2 correct answers).

A.

The dependent variable is the outside temperature

B.

The relationship between outside temperature and number of customers per hour is a Linear Regression

C.

The dashed lines indicate with 95% confidence where all of the process data should fall between

D.

The dashed lines indicate with 95% confidence the estimate for the Quadratic Regression Line

E.

The predicted number of customers per hour is close to 5 if the outside temperature is 10 deg C

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Question # 10

Which Experimental Design typically is most associated with the fewest number of input variables or factors in the design?

A.

Response Surface design

B.

Full Factorial design

C.

Simple Linear Regression

D.

Fractional Factorial design

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Question # 11

A valid Multiple Linear Regression (MLR) is characterized by all of these except?

A.

It is an assumption that the X’s (inputs) are not correlated to each other

B.

The X’s (inputs) are assumed to be independent of each other

C.

The Residuals from MLR analysis have to be Normally Distributed

D.

MLR is conducted based on a deliberate form of experimentation

E.

It is not possible to evaluate interactions in a MLR analysis

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Question # 12

Accuracy can be assessed in several ways and a fairly accurate means of measurement is visual comparison.

A.

True

B.

False

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Question # 13

Fractional Factorial designs are used to reduce the ____________ because the number of runs has been lowered.

A.

Time and cost of experiments

B.

Number of people involved

C.

Number of data measurement points

D.

Output summary

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Question # 14

A valuable tool to use during the Measure Phase to show material and information flow throughout an entire process is the ______________ .

A.

Value Stream Map

B.

FMEA

C.

Pareto Chart

D.

Standard Operating Procedure

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Question # 15

A dock worker for a feed supplier was tasked with assuring the proper weight in the feed bags as they left the dock. One of the columns listed the range of weight of the bags included in the studies. This required plotting a Histogram of the weight of the bags. While drawing the Histogram the x-axis contained a certain scale of data. Pick the scale of data that is appropriate for Histograms.

A.

Ordinal Scale Data

B.

Interval Scale Data

C.

Nominal Scale Data

D.

Ration Scale Data

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Question # 16

The Waste of Overproduction is defined as ______________________.

A.

The unnecessary movement of people and equipment

B.

The liability of materials that are bought, invested in and not immediately sold or used

C.

Producing more than the next step needs or more than the customer buys

D.

The extra movement of material

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Question # 17

A Belt has determined that the inventory of repair parts at a rework station can be reduced by 45%. According to Cost of Poor Quality (COPQ) definitions inventory reduction would be considered _______________.

A.

Soft Savings

B.

COPQ efficiency

C.

Median Savings

D.

Hard Savings

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Question # 18

The Normal Distribution is considered to be the most important distribution in statistics and, among other things is defined as having a total area under the curve of 1, is mounded and symmetrical and the Mean, Median and Mode are _____________.

A.

All evenly divisible by 3

B.

Twice the Standard Deviation

C.

Within 10% of each other

D.

The same number

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Question # 19

If the production is for higher volume and monitoring and the Mean and variability is to be monitored for four machines producing product and the characteristic to be monitored is Variable Data, which SPC Chart is best to be selected?

A.

Xbar-R Chart

B.

Individual-MR Chart

C.

NP Chart

D.

CUSUM Chart

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Question # 20

A valid Multiple Linear Regression (MLR) is characterized by all of these except _______________________.

A.

It is an assumption that the X’s (inputs) are not correlated to each other

B.

The X’s (inputs) are assumed to be independent of each other

C.

MLR is conducted based on a deliberate form of experimentation

D.

The Residuals from MLR analysis have to be Normally Distributed

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Question # 21

The two types of data that can be used in Statistical Analysis are Attribute and Variable.

A.

True

B.

False

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Question # 22

An operator checks that all boxes being packed contain enough products to fill the box. However, each box getting filled has a different number of products in it. This is a Reproducibility problem, not a Repeatability problem.

A.

True

B.

False

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Question # 23

A Belt working in a supply chain environment has to make a decision to change suppliers of critical raw materials for a new product upgrade. The purchasing manager is depending on the Belt’s effort requiring that the average cost of an internal critical raw material component be less than or equal to $4,200 in order to stay within budget. Using a sample of 35 first article components, a Mean of the new product upgrade price of $4,060, and a Standard Deviation of $98 was estimated. The Alternative Hypothesis in the above example is?

A.

The Standard Deviation is equal to $300

B.

The Mean is less than $4,320

C.

The Mean is equal to $4,060

D.

The Mean is less than $4,200

E.

The Mean is greater than $ 4,200

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Question # 24

When we gather information for the Voice of the Business we are primarily interested in information concerning the _____________ of the business.

A.

Advertising budget

B.

Market share

C.

Profitability

D.

Ownership

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Question # 25

At the very initiation of a project a Belt must develop a concise _______________ that states at a high level the area of concern and why it is important this issue be improved.

A.

Business Case

B.

Project Doctrine

C.

Management Justification

D.

Process Owner Disclosure

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Question # 26

A Full Factorial experiment using a 3 level 3 factor approach has been proposed to test the viability of an extrusion machine experiment. How many treatment combinations will this approach involve?

A.

6

B.

9

C.

27

D.

54

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Question # 27

Handling of warranty returns, process improvement team meetings and rework to meet customer expectations are all examples of business costs that are classified as ________________ .

A.

Nuisance

B.

Non-value Add

C.

Necessary

D.

Unavoidable

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Question # 28

SPC Charts are used extensively in different business and decision-making environments. In this example a vendor is being selected based on speed of delivery. Which of the conclusions would help you pick a vendor for your needs regarding lead-time of delivery from your vendors? (Note: There are 4 correct answers).

A.

Vendor A with a much shorter lead time in delivery

B.

Vendor B as it has a better consistency (lower variance) on lead time

C.

Vendor B since Vendor A shows a situation out of control as shown in red

D.

Vendor B since the Control Limits are much narrower than Vendor A

E.

Vendor B has higher lead time, but a process with much narrower Control Limits

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Question # 29

Production Line 1 is able to complete 500 units per shift. Production Line 2 is able to finish 1,500 units per shift. Production Line 2 is 3 times faster than Production Line 1. This analysis is an example of ______________ Scale Data.

A.

Nominal

B.

Ratio

C.

Ordinal

D.

Interval

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Question # 30

Which of these graphical presentations displays the values of each individual reading?

A.

Histogram

B.

Box Plot

C.

Stem and Leaf Plot

D.

X-Y Diagram

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Question # 31

The Greek letter “sigma” is used by mathematicians to signify _____________.

A.

Curve Width

B.

Numerical Average

C.

Standard Deviation

D.

Data Spread

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Question # 32

Appropriate measures means that measurements are ______________.

A.

Representative

B.

Sufficient

C.

Contextual

D.

Relevant

E.

All of these answers are correct

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Question # 33

A Belt working in a supply chain environment has to make a decision to change suppliers of critical raw materials for a new product upgrade. The purchasing manager is depending on the Belt’s effort requiring that the average cost of an internal critical raw material component be less than or equal to $2,800 in order to stay within budget. Using a sample of 55 first article components, a Mean of the new product upgrade price of $2,240 and a Standard Deviation of $120 was estimated. Based on the data provided, the Z value for the data assuming a Normal Distribution is?

A.

2.33

B.

4.67

C.

6.48

D.

8.28

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Question # 34

What conclusion is most correct about the Experimental Design shown here with the response in the far right column?

A.

No factor has enough statistical confidence greater than 95% to have an impact on the response rate

B.

Constant, Adv and Bev are the only factors statistically affecting the response rate with 95% confidence or more

C.

If the Adv is increased from the low level to the high level, the response rate increases

D.

The response level is statistically concluded to only need the Adv and Bev factors set at the low level to get the largest response rate

E.

This design does not have enough experimental runs to conclude anything as evidenced by the lack of P-values in the MINITABTM output

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Question # 35

Using this partial Z Table, how many units from a month’s production run are expected to not satisfy customer requirements for the following process?

Upper specification limit: 8.4 Lower specification limit: 4.7 Mean of the process: 6.2 Standard Deviation: 2.2 Monthly production: 360 units

A.

8

B.

13

C.

28

D.

57

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Question # 36

Which statement(s) are correct about the Pareto Chart shown here for the DOE analysis? (Note: There are 2 correct answers).

A.

It is unknown from this graph how many factors were in the Experimental Design

B.

The factors to keep in the mathematical model are E, D, DE, BD and B with an alpha risk equal to 2.06

C.

The effects to keep in the mathematical model are E, D, DE, BD and B with an alpha risk equal to 0.05

D.

The factors to keep in the mathematical model with a 5% alpha risk are BE, AB, A and AD

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Question # 37

For the data shown here which statement(s) are true? (Note: There are 2 correct answers).

A.

With 95% confidence, we cannot conclude if the samples are from three Normal Distributions

B.

With greater than 95% confidence, we conclude the samples are from Non-normal Distributions

C.

If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test

D.

If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test

E.

If we wanted to compare the Central Tendencies of all three samples we could use the Mann-Whitney test

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Question # 38

What conclusion is most correct about the Experimental Design shown here with the response in the far right column?

A.

No factor has enough statistical confidence greater than 95% to have an impact on the response rate

B.

Constant, Adv and Bev are the only factors statistically affecting the response rate with 95% confidence or more

C.

If the Adv is increased from the low level to the high level, the response rate increases

D.

The response level is statistically concluded to only need the Adv and Bev factors set at the low level to get the largest response rate

E.

This design does not have enough experimental runs to conclude anything as evidenced by the lack of P-values in the MINITABTM output

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Question # 39

Some of the sources for different types of error that can be quantified using Statistical Analysis are which of these?

A.

Error in sampling

B.

Bias in sampling

C.

Error in measurement

D.

All of the above

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Question # 40

For a Normal Distribution as samples size increases the Range in Mean and Standard Deviation decrease relative to the Mean and Standard Deviation of the population.

A.

True

B.

False

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Question # 41

If a Six Sigma project was to reduce changeover times and the team found the project success was decreasing over time since changeover times began to creep back up, which Lean tools should be considered in the Control Phase to reestablish and sustain the project success?

A.

Improve the lighting to assure adequate visibility

B.

Confirm a Visual Factory exists to assure proper communication of status of machines

C.

Implement Kanbans to assure enough inventory for the process step

D.

Reword the standardized work instructions to use active verbs and not passive phrases

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Question # 42

A(n) ______________ is best used to compare a Machine 1 average quality characteristic to the same quality characteristic of Machine 2.

A.

F test

B.

1-Sample t-test

C.

2-Sample t-test

D.

ANOVA test

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Question # 43

Which statement(s) are correct about the DOE Factorial plot output here? (Note: There are 3 correct answers).

A.

Two factors were operated at 3 levels each

B.

The highest tool age was achieved with metal hardness at high level while keeping the cutting speed at the low level

C.

The design indicated above is a 32 factorial design

D.

The cutting speed and cutting angle are at the low level for the least tool age achieved

E.

All factors had 2 levels in the experiment

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Question # 44

A ___________ is used primarily to track the stability of the average value of a metric of interest.

A.

NP Chart

B.

Xbar-R Chart

C.

I-MR Chart

D.

C Chart

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Question # 45

Appropriate measures means that measurements are ______________.

A.

Representative

B.

Sufficient

C.

Contextual

D.

Relevant

E.

All of these answers are correct

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