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IASSC ICBB IASSC Lean Six Sigma - Black Belt Exam Practice Test

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Total 300 questions

IASSC Lean Six Sigma - Black Belt Questions and Answers

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Question 1

When we compare short-term and long-term Capability which of these is true?

Options:

A.

Cp is better for the short term

B.

Both short-term and long-term performance are alike

C.

Performance tends to improve over time

D.

Cp is better for the long-term

Question 2

Which Element of Waste best describes "the unnecessary movement of materials and goods"?

Options:

A.

Overprocessing

B.

Inventory

C.

Motion

D.

Conveyance

Question 3

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. In order to increase the Long Term Z value to 4, what is the maximum long term variation in pricing the Belt can accept for his upgraded critical raw material component?

Options:

A.

$20

B.

$35

C.

$70

D.

$110

Question 4

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

Question 5

In a Fishbone Diagram the 6M’s stand for Methods, Measurements, Machine, Man, Mother Nature and ____________ .

Options:

A.

Management

B.

Merger

C.

Materials

D.

Medical

Question 6

The reported Cpk for a process with an average of 104 units, a spread of 18 units and upper and lower specification limits of 122 and 96 units would be?

Options:

A.

0.5

B.

0.89

C.

1.00

D.

2.00

Question 7

When conducting a Hypothesis Test using Continuous Data the proper sample size is influenced only by the extent to which we need to assess a Difference to be detected but not the inherent variation in the process.

Options:

A.

True

B.

False

Question 8

When a Belt properly analyzes the results of an experiment he must examine the Residuals in expectation of finding all of the following except _________.

Options:

A.

Some Residuals higher than others

B.

Residuals will represent a Linear Regression

C.

All Residuals within 2 Standard Deviations of the Mean

D.

Some Residuals lower than others

Question 9

With Measurement System Analysis we are concerned with two issues that impact the potential variability of the data. They are _____________________.

Options:

A.

Precision and Accuracy

B.

Reliability and Repeatability

C.

Error and Spread

D.

Sensitivity and Deflection

Question 10

Which of these items are not part of what is necessary for successful Kaizens?

Options:

A.

Good lighting

B.

Management support

C.

Operator support

D.

Analysis tools

Question 11

The distance between the Mean of a data set and the Point of Inflection on a Normal curve is called the _______________.

Options:

A.

Curve Spread

B.

Standard Deviation

C.

Numerical Average

D.

Data Breadth

Question 12

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

Options:

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

Question 13

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”

Question 14

Customers make their decisions based on Features, Integrity (of the seller) Delivery and ___________?

Options:

A.

Color

B.

Expense

C.

Season

D.

None

Question 15

During the ______________ phase of 5S is when we might implement a Red Tag program.

Options:

A.

Straightening

B.

Standardizing

C.

Shining

D.

Sorting

Question 16

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

Question 17

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

Question 18

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

Question 19

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

Question 20

The Control Limits width varies if the sample size varies for which type of chart?

Options:

A.

P Charts

B.

NP Charts

C.

Xbar-R Charts

D.

Time Series Charts

Question 21

Fractional Factorial Designs are used to analyze factors to model the output as a function of inputs if Hypothesis Testing in the Analyze Phase was inadequate to sufficiently narrow the factors that significantly impact the output(s).

Options:

A.

True

B.

False

Question 22

The _____________ Distribution would be the most desirable for modeling the number of stitch defects in a portion of fabric.

Options:

A.

Exponential

B.

Extended

C.

Poisson

D.

Weibull

Question 23

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

Question 24

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: 7.2 Lower specification limit: 4.3 Mean of the process: 5.9 Standard Deviation: 0.65 Monthly production: 450 units

Options:

A.

3

B.

7

C.

10

D.

12

Question 25

Measurement __________ is defined as the difference between the observed and the expected values for a given set of data.

Options:

A.

Breadth

B.

Linearity

C.

Range

D.

Bias

Question 26

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

Question 27

On a _________________ a Belt screens variables, or various inputs, to analyze their relative impact on the output of concern.

Options:

A.

X-Y Matrix

B.

Weighted Scale

C.

Multi-Vari Chart

D.

Poisson Chart

Question 28

A Full Factorial experiment using a 2 level 4 factor approach has been proposed to test the viability of an extrusion machine experiment. How many treatment combinations will this approach involve?

Options:

A.

8

B.

16

C.

32

D.

64

Question 29

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

Options:

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

Question 30

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

Question 31

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

Question 32

The Central Limit Theorem says that as the sample size becomes large the sample Mean distribution will form a Normal Distribution, ____________________.

Options:

A.

If the Measurement System is properly calibrated

B.

When the data is collected accurately

C.

If the shape is evenly spread

D.

No matter what the shape of the population distribution of individuals

Question 33

Time is always the metric on the horizontal scale of a(n) ___________ Chart.

Options:

A.

Pareto

B.

Xbar

C.

Multi-Vari

D.

NP

Question 34

It would be more likely than not for a Belt conducting a Regression Analysis to find that the _______________________.

Options:

A.

r2 value is smaller than the absolute value of r

B.

Correlation Coefficient equals r2

C.

Coefficient of Determination is less than r2

D.

Correlation Coefficient equals r divided by 2

Question 35

Which of these is not a primary cause for Non-normal Data?

Options:

A.

Skewness

B.

Mixed Distributions

C.

Kurtosis

D.

Formulosis

E.

Granularity

Question 36

Sally and Sara sell flower pots at their garage sale. Martha motivates Rose mentioning that they will sell a minimum of 16 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 15.2 pots per day were sold with a Standard Deviation of 0.6 pots. What is the Z value for this sales process?

Options:

A.

0.67

B.

1.13

C.

1.33

D.

2.66

Question 37

Relative to a Design of Experiments the term ________________ refers to variables being a linear combination of each other.

Options:

A.

Mirror Image

B.

Directly Parallel

C.

Collinear

D.

None of the above

Question 38

From the variance F-test shown above, which of these conclusions is/are valid?

Options:

A.

The variance between the class score distribution is not significantly different

B.

This test applies only to Normal Distributed data at 99 % confidence

C.

The variance between the class score distribution is significantly different

D.

There are not enough data points to make any statistical conclusions

Question 39

If a process has subgroups for Variable data and the process runs for a long period of time, then the best pair of SPC Charts to use would be an Xbar and _________.

Options:

A.

NP Chart

B.

Individuals Chart

C.

R Chart

D.

C Chart

Question 40

For her injection molding project a Belt needed to track the percentage of defectives of a particular sample set so she used a ___________ to display the data?

Options:

A.

Individual Chart

B.

C Chart

C.

Xbar Chart

D.

P Chart

Question 41

If in an experiment all possible variable pairs sum to zero the design is Orthogonal.

Options:

A.

True

B.

False

Question 42

An operator is measuring the distance between two points. Which is most likely to be influenced by the operator?

Options:

A.

Precision of the measurement

B.

Accuracy of the measurement

C.

Calibration of the instrument

D.

All of these answers are correct

Question 43

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

Question 44

Which of these graphs demonstrates conditions which would be sufficient to enable OCAP for the process? 

Options:

A.

Xbar Chart

B.

Time Series Chart

C.

Neither

D.

Both

Question 45

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

Page: 1 / 30
Total 300 questions