# Certified Lean Six Sigma Black Belt (CLSSBB) v6.1 (CLSSBB)

Page:    1 / 20
Total 300 questions

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).

• 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”

Answer : BD

Assessing process proportion as opposed to evaluating a process with respect to a set target can be done using which of these?

• A. Process proportion equals some value range
• B. Process proportion equals some desired value
• C. Target is current
• D. Proportion of the tail is equal

Answer : B

A Non-parametric Test should be used if just one distribution is not Normal out of the two or more gathered.

• A. True
• B. False

Answer : A

Contingency Tables are used to test for association, or dependency, between two or more classifications.

• A. True
• B. False

Answer : A

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

• 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.

Answer : BD

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

• A. F test
• B. 1-Sample t-test
• C. 2-Sample t-test
• D. ANOVA test

Answer : C

For the data set shown here which of these statements is/are true?

• A. Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples
• B. A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set
• C. Grade A has the lowest sample Mean of the 3 samples
• D. Grade A has a higher sample Mean than Grade B

Answer : C

Review the analysis shown there.

Which statements are true about the process? (Note: There are 3 correct answers).

• A. The initial focus for this project would be to determine why the thicknesses are so frequently too low.
• B. The majority of the process is closer to the lower specification limit.
• C. This process is described with the Weibull Distribution.
• D. The process has more problems with Variation than Centering.
• E. The process follows a non-normal distribution with the given data.

Answer : BDE

A Lean Six Sigma project is attempting to reduce inventory days. The Process Capability will be monitored as part of the Control Phase to track the sustainability of the improvement.

Which distribution type is best used for performing the Capability Analysis?

• A. Weibull Distribution
• B. Normal Distribution
• C. Exponential Distribution
• D. Logistic Distribution
• E. Gaussian Distribution

Answer : A

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

• 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

Answer : D

A(n) ________________ has occurred when two inputs have a greater impact on a change in the output than either of the inputs has by itself.

• A. Dependency
• B. Bimodal reaction
• C. Interaction
• D. Amplified effect

Answer : C

When conducting a Hypothesis Test using Continuous Data the proper sample size is influenced by the extent to which we need to assess a Difference to be detected and the inherent variation in the process.

• A. True
• B. False

Answer : A

The validity of the decision made with Hypothesis Testing is dependent upon all of these except __________________.

• A. Beta risk
• B. Alpha risk
• C. Range of data
• D. Sample size

Answer : C

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.

• A. True
• B. False

Answer : A

To be an effective Lean Six Sigma practitioner one must understand the difference between ___________________________.

• A. ANOVA and the Analysis of Variance
• B. Nonparametric tests and tests of Non-normal Data
• C. F-test and test of variances of 2 samples
• D. Practical and Statistical significance

Answer : D

Page:    1 / 20
Total 300 questions