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CSSBB Certified Six Sigma Black Belt Questions and Answers

Questions 4

The Mann-Whitney test is a powerful test and is unique to situations from which of the choices listed? (Note: There are 2 correct answers).

Options:

A.

Testing the identity of two populations

B.

Focuses on equality of the Median of the two populations

C.

Less powerful than the traditional “t-test”

D.

More widely applicable than the traditional “t-test”

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Questions 5

A fundamental rule is that both Standard Deviation and Variance can be added.

Options:

A.

True

B.

False

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Questions 6

When a Belt Poka-Yoke’s a defect out of the process entirely then she should track the activity with a robust SPC system on the characteristic of interest in the defect as an early warning system.

Options:

A.

True

B.

False

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Questions 7

“A calculated time frame that matches customer demand” is a definition of what Lean Principles term?

Options:

A.

Value Stream

B.

Kaizen event

C.

Takt time

D.

Kanban

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Questions 8

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

Options:

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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Questions 9

Which statements are correct about the advanced Capability Analysis shown here? (Note: There are 3 correct answers).

Options:

A.

This is a Poisson Capability Analysis

B.

The average DPU with 95% confidence is between 0.024 and 0.0295

C.

The DPU does not seem to vary depending on sample size

D.

The process shows only one instance of being out of control statistically so we have confidence in the estimated DPU of this process

E.

The maximum DPU in one observation was nearly 0.0753

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Questions 10

Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that they will sell a minimum of 15 pots per day if the outside temperature exceeds 60o F. From a sample, whose population is assumed to follow a Normal Distribution, taken for 30 days at 60 degrees or more an average of 13.6 pots per day were sold with a Standard Deviation of 0.7 pots. The statistical Degrees of Freedom for this example are?

Options:

A.

1

B.

29

C.

30

D.

31

E.

2

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Questions 11

An ANOVA used across many dependent variables could increase the Beta risk.

Options:

A.

True

B.

False

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Questions 12

Fractional Factorial, ____________and Response Surface Method are types of planned experiments.

Options:

A.

Multi-Vari Analysis

B.

Baldridge Channels

C.

One Factor at a Time or OFAT

D.

Factorial Design

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Questions 13

The Lean toolbox includes all of the following items except __________.

Options:

A.

Poke-Yoke

B.

Standard Operating Procedures

C.

Kaizen

D.

5S the work area

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Questions 14

What dollar amount of savings would a project show if it reduced your outstanding Accounts Receivable by $1.4 million dollars to $5.3 million total and your organization’s marginal cost of capital was 6.2%?

Options:

A.

$43,400

B.

$86,800

C.

$117,500

D.

$328,600

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Questions 15

Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that they will sell a minimum of 15 pots per day if the outside temperature exceeds 60o F. From a sample, whose population is assumed to follow a Normal Distribution, taken for 30 days at 60 degrees or more an average of 13.6 pots per day were sold with a Standard Deviation of 0.7 pots. For the sales accomplished above, what test would validate if they met their requirements?

Options:

A.

F Test

B.

Test for Equal Variance

C.

Chi Square Test

D.

One-Sample t-Test

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Questions 16

If the results from a Hypothesis Test are located in the "Region of Doubt" area, what can be concluded?

Options:

A.

Rejection of the Alpha

B.

We fail to reject the Null Hypothesis

C.

The test was conducted improperly

D.

We reject the Null Hypothesis

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Questions 17

A Belt rearranged the location of the parts inventory for a rework station locating the most often used parts to be within hand reach of the repair person. This rearrangement resulted in quicker repair times by eliminating one of seven major elements of waste which is the Waste of __________.

Options:

A.

Motion

B.

Conveyance

C.

Inventory

D.

Waiting

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Questions 18

Some of the sources for different types of error that can be quantified using Statistical Analysis are ___________________.

Options:

A.

Error in sampling

B.

Bias in sampling

C.

Error in measurement

D.

All of these answers are correct

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Questions 19

Using this data calculate the percentage of DPU.

Options:

A.

2.74

B.

3.23

C.

4.56

D.

5.93

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Questions 20

Statistical Difference is the magnitude of difference or change required to distinguish between a true difference, brought about by change or improvement, and one that could have occurred by chance.

Options:

A.

True

B.

False

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Questions 21

One of the foundations of Lean Six Sigma is the concept that the output of a process (Y) is influenced by the process inputs (X’s) and is commonly shown as which formula?

Options:

A.

Y = Z(X2)

B.

Y = f(X3)

C.

Y = f(Xn)

D.

Y = g(X+ 1.5)

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Questions 22

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).

Options:

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

D.

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

E.

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

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Questions 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. Select the answer that best states the Practical Problem.

Options:

A.

If the average cost per component is $4,200 or less, then the purchase manager will introduce the new product upgrade with new components

B.

If the average cost per component is greater than $4,200, then the purchase manager will introduce the new product upgrade with new components

C.

Only if the average cost per product upgrade is $4,060, will the purchase manager introduce new product upgrades with new components

D.

If the average cost per new product upgrade is less than $180, then the purchase manager will introduce the new product upgrade with new components

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Questions 24

For Attribute Data, Process Capability is defined as the average proportion of nonconforming products.

Options:

A.

True

B.

False

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Questions 25

One of the foundations of Lean Six Sigma is the concept that the output of a process (Y) is influenced by the process inputs (X’s) and is commonly shown as which formula?

Options:

A.

Y = Z(X2)

B.

Y = f(X3)

C.

Y = f(Xn)

D.

Y = g(X+ 1.5)

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Questions 26

Two of the key deliverables for the Measure Phase are a robust description of the process and its flow and an assessment of the Management System.

Options:

A.

True

B.

False

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Questions 27

If you can Poka-Yoke a defect out of the process entirely then you do not need use SPC on the characteristic of interest in the defect.

Options:

A.

True

B.

False

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Questions 28

Which statement is most correct for the Regression Analysis shown here?

Options:

A.

The Regression explains 50.8% of the process variation

B.

The air-fuel ratio explains most of the TurbineOutput variation

C.

This Simple Linear Regression explains 98+% of the process variation

D.

This Multiple Linear Regression has four statistically significant independent variables

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Questions 29

Sally bought a blender from her local appliance store. When she changed blades the blender would not function. For the manufacturer this would be categorized as what type of cost?

Options:

A.

Internal Failure Costs

B.

External Failure Costs

C.

Prevention Costs

D.

Appraisal Costs

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Questions 30

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

Options:

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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Questions 31

Following the completion of a LSS project the Belt not only creates a Control Plan he also develops a _____________ so those involved in the process know what to do when the critical metrics move out of spec.

Options:

A.

Response Plan

B.

Call List

C.

Chain-of-Command

D.

Defect Analysis Plan

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Questions 32

When the Inputs, X’s, for your process are Normally Distributed about the Mean, the Outputs, Y’s, will always be Normally Distributed.

Options:

A.

True

B.

False

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Questions 33

Which statement(s) are most correct for the Regression Analysis shown here?

Options:

A.

The Regression explains 50.8% of the process variation

B.

The air-fuel ratio explains most of the TurbineOutput variation

C.

This Simple Linear Regression explains 98+% of the process variation

D.

This Multiple Linear Regression has four statistically significant independent variables

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Questions 34

From this list select the items that define what an X-Y Diagram is. (Note: There are 4 correct answers).

Options:

A.

Created for every project

B.

Based on team's collective opinions

C.

Updated whenever a parameter is changed

D.

Used to show each step in a process

E.

A living document throughout project lifecycle

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Questions 35

To properly analyze the variables impacting the output of a process we need to collect data that represents at least 80% of the variation in the process and assure ourselves we are collecting data from all three types of variation which are _______________.

Options:

A.

Within, Between and Temporal

B.

Within, Between and Temporary

C.

Without, Above and Below

D.

Induced, Natural and Unavoidable

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Questions 36

Cost of Poor Quality (COPQ) can be classified as Visible Costs and Hidden Costs. Which of these items is a Visible Cost?

Options:

A.

Lost Customer Loyalty

B.

Time Value of Money

C.

Returns

D.

Late Delivery

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Questions 37

For a Kanban to be successful which of these must occur?

Options:

A.

Consistent cycle times

B.

Fairly stable process demand of product or service

C.

Low defect rate of incoming product or service

D.

All of the above

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Questions 38

Since Normality is required if we intend to use the data collected as a predictive tool. To test for Normality of data we must determine if the P-value is ___________.

Options:

A.

Equal to 0.05

B.

Less than 0.05

C.

Greater than 0.05

D.

Greater than 0.5

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Questions 39

If a Belt needed to model the data for the number of weaves in section of carpet fabric she would use the _____________ Distribution approach.

Options:

A.

Poisson

B.

Extended

C.

Exponential

D.

Weibull

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Questions 40

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

Options:

A.

The air-fuel ratio explains most of the TurbineOutput variation

B.

The Regression explains over 98% of the process variation

C.

This Multiple Linear Regression has three statistically significant independent variables

D.

If the air-fuel ratio increases by 1, the TurbineOutput more than triples

E.

The SteamExitTemp explains the most variation of the TurbineOutput

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Questions 41

Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that they will sell a minimum of 22 pots per day if the outside temperature exceeds 60o F. From a sample, whose population is assumed to follow a Normal Distribution, taken for 30 days at 60 degrees or more an average of 18.2 pots per day were sold with a Standard Deviation of 0.9 pots. What is the Z value for this sales process?

Options:

A.

1.23

B.

1.62

C.

2.11

D.

4.22

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Questions 42

Control Charts were developed by Dr. Shewhart to track data over time. To detect Special Cause variation the Control Charts use which of these?

Options:

A.

Data shift analysis

B.

Outlier analysis methods

C.

Center Line and Control Limits

D.

None of the above

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Questions 43

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.

Options:

A.

Nominal

B.

Ratio

C.

Ordinal

D.

Interval

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Questions 44

An example of the waste of mismanaged Inventory is __________.

Options:

A.

Capital costs of money

B.

Value decrease from aged inventory

C.

Cost of storage space

D.

All of these answers are correct

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Questions 45

Appropriate measures means that measurements are ______________.

Options:

A.

Representative

B.

Sufficient

C.

Contextual

D.

Relevant

E.

All of these answers are correct

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Exam Code: CSSBB
Exam Name: Certified Six Sigma Black Belt
Last Update: Dec 22, 2024
Questions: 300

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