What does R^2 measure in the analysis of a designed experiment?

The proportion of response variation explained by the model

The correlation between two experimental factors

The proportion of runs that produced acceptable output

The probability that the model coefficients are all zero

Are the questions aligned with the ASQ CSSBB Body of Knowledge?

Yes. Each question is written around topics included in the published CSSBB Body of Knowledge and is tagged to the relevant BoK area. These are original practice questions and are not copied from the actual ASQ exam.

In Review Mode, you receive the correct answer and explanation immediately after answering each question. It is designed for learning, not just scoring, so you can correct misunderstandings before moving to the next question.

Does the quiz include calculations?

Yes. The free set includes a balanced mix of conceptual questions, applied scenarios and short calculations. The goal is to help you experience several common CSSBB question styles.

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No single 20-question quiz can confirm full exam readiness. Use it as an initial diagnostic, then assess yourself across larger question sets covering the complete Body of Knowledge.

What is included in the full CSSBB practice-question package?

The complete package provides additional CSSBB -style practice sets with broader Body of Knowledge coverage, detailed explanations and more opportunities to work on calculations, scenarios and commonly confused concepts.

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No. These are independent exam-preparation materials. Registration, eligibility review and the official certification examination are handled separately by ASQ.

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Free sample questions

2 questions from this set, shown in full with the correct answer and the reasoning behind it. Read them as a study resource.

Q1.A $2^{5-2}$ fractional factorial design is selected.

How many runs does it require?
- A.8✓ Correct answer
- B.16
- C.32
- D.10
Explanation
The exponent gives the run count directly:

$2^{5-2} = 2^3 = 8 \text{ runs}$

This is a quarter fraction of the 32-run full factorial, and the saving is paid for by aliasing among the effects.
Reference: CSSBB BoK VII
Q2.What does $R^2$ measure in the analysis of a designed experiment?
- A.The correlation between two experimental factors
- B.The proportion of runs that produced acceptable output
- C.The proportion of response variation explained by the model✓ Correct answer
- D.The probability that the model coefficients are all zero
Explanation
$R^2$ reports how much of the observed variation the model explains, but it never decreases when terms are added. Adjusted $R^2$ and predicted $R^2$ are reported alongside it precisely to expose overfitting.
Reference: CSSBB BoK VII

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20 exam-style CSSBB questions focused on Design of Experiments (DoE)
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Preparing for the ASQ Certified Six Sigma Black Belt exam?

This paid 20-question practice quiz focuses specifically on Design of Experiments (DoE), an important topic within the CSSBB Body of Knowledge.

The questions include a practical mix of:

Factors, levels, responses, and treatments
Full and fractional factorial designs
Main effects and interaction effects
Randomization, replication, and blocking
Experimental error and confounding
Resolution of fractional factorial designs
Selecting and interpreting experimental designs
Workplace scenarios and short calculations

Learn from Every Question

This quiz is offered in Review Mode, so you will see the correct answer and a clear explanation immediately after each response.

Each explanation helps you understand:

Why the correct answer is right
Which DoE principle is being tested
Why the other options are less appropriate
How the concept may appear in a CSSBB-style question

The goal is not simply to check your score. It is to help you understand how experiments are planned, analyzed, and interpreted in Six Sigma projects.

Part of the Paid CSSBB Practice Package

This 20-question quiz is included in the complete CSSBB Practice Test Package.

Use it to:

Strengthen your understanding of experimental design
Identify gaps in DoE concepts and calculations
Practise interpreting main effects and interactions
Improve your confidence before the CSSBB exam
Learn from detailed explanations as you progress

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CSSBB Practice Questions (Review Mode) - 7. Design of Experiments (DoE)

Free sample questions

Q1.A 25−22^{5-2}25−2 fractional factorial design is selected.How many runs does it require?

Explanation

Q2.What does R2R^2R2 measure in the analysis of a designed experiment?