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Six Sigma ICBB Practice Test - Questions Answers, Page 24

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For a batch manufacturing process, while assessing short term process variation, which variation category(ies) should one need to focus on? (Note: There are 2 correct answers).

A.
Variation within consecutive pieces
A.
Variation within consecutive pieces
Answers
B.
Variation among consecutive batches
B.
Variation among consecutive batches
Answers
C.
Variation among groups of pieces
C.
Variation among groups of pieces
Answers
D.
Variation among the completed product
D.
Variation among the completed product
Answers
Suggested answer: A, B

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

A.
True
A.
True
Answers
B.
False
B.
False
Answers
Suggested answer: B

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

A.
Error in sampling
A.
Error in sampling
Answers
B.
Bias in sampling
B.
Bias in sampling
Answers
C.
Error in measurement
C.
Error in measurement
Answers
D.
All of the above
D.
All of the above
Answers
Suggested answer: D

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
A.
True
Answers
B.
False
B.
False
Answers
Suggested answer: A

From this list select the best example of Bias in Sampling.

A.
Testing the completeness of cooking a cake but the testers cannot agree on how to measure internal temperature
A.
Testing the completeness of cooking a cake but the testers cannot agree on how to measure internal temperature
Answers
B.
Testing the sharpness of a razor blade while the sample of 500 are from the same model razor
B.
Testing the sharpness of a razor blade while the sample of 500 are from the same model razor
Answers
C.
Testing the weight of participants at a wrestling event and only measuring those who finished second or better
C.
Testing the weight of participants at a wrestling event and only measuring those who finished second or better
Answers
D.
Testing a hand-held GPS models for durability using samples only from Nokia Model P120
D.
Testing a hand-held GPS models for durability using samples only from Nokia Model P120
Answers
Suggested answer: C

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

A.
If the Measurement System is properly calibrated
A.
If the Measurement System is properly calibrated
Answers
B.
When the data is collected accurately
B.
When the data is collected accurately
Answers
C.
If the shape is evenly spread
C.
If the shape is evenly spread
Answers
D.
No matter what the shape of the population distribution of individuals
D.
No matter what the shape of the population distribution of individuals
Answers
Suggested answer: D

A statistical test or Hypothesis Test is performed to reject or fail to reject a stated hypothesis and it converts the Practical Problem into a Statistical Problem.

A.
True
A.
True
Answers
B.
False
B.
False
Answers
Suggested answer: A

The class score distribution of schools in a metropolitan area is shown here along with an analysis output. Comment on the statistical significance between the Means of the two distributions. Select the most appropriate statement.

A.
The two class Means are statistically different from each other
A.
The two class Means are statistically different from each other
Answers
B.
The two class Means statistically not different from each other
B.
The two class Means statistically not different from each other
Answers
C.
Inadequate information on class Means to make any statistical conclusions
C.
Inadequate information on class Means to make any statistical conclusions
Answers
D.
A visual comparison shows that class Means are not statistically different
D.
A visual comparison shows that class Means are not statistically different
Answers
Suggested answer: A

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

A.
Precision of the measurement
A.
Precision of the measurement
Answers
B.
Accuracy of the measurement
B.
Accuracy of the measurement
Answers
C.
Calibration of the instrument
C.
Calibration of the instrument
Answers
D.
All of these answers are correct
D.
All of these answers are correct
Answers
Suggested answer: D

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

A.
True
A.
True
Answers
B.
False
B.
False
Answers
Suggested answer: B
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