IASSC Lean Six Sigma – Black Belt (ICBB) Practice Test

Questions # 61:

Which one of these tools is frequently used to help drill down to possible causes once a Fishbone Diagram is constructed?

Options:

3 When Analysis

5 Why Analysis

Ishikawa Diagram

Skeleton Diagnostic

Questions # 62:

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

Options:

Value Stream Map

FMEA

Pareto Chart

Standard Operating Procedure

Questions # 63:

Which statement(s) are correct about the Factorial Plot shown here? (Note: There are 3 correct answers).

Question # 63

Options:

When the cutting speed increased from low to high level, the tool age increases

The coefficient of the metal hardness is positively related to the output of tool age

The coded coefficient is lower for cutting speed than the cutting angle related to the output of tool age

These plots prove a statistically significance factor with 95% confidence

These plots are an example of interaction plots

Questions # 64:

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

Options:

Curve Spread

Standard Deviation

Numerical Average

Data Breadth

Questions # 65:

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

Options:

True

False

Questions # 66:

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

Question # 66

Options:

The air-fuel ratio explains most of the TurbineOutput variation

The Regression explains over 98% of the process variation

This Multiple Linear Regression has three statistically significant independent variables

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

The SteamExitTemp explains the most variation of the TurbineOutput

Questions # 67:

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

Options:

1-Sample t-test

2-Sample t-test

F test

ANOVA test

Questions # 68:

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

Options:

Management

Merger

Materials

Medical

Questions # 69:

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

Question # 69

Options:

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

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

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

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

Questions # 70:

Use this data to calculate the Z score. Average oF. 65, Standard Deviation: 3, Upper Spec Limit: 72

Options:

0.27

1.5

2.33

4.12

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