Certified Six Sigma Black Belt Exam Certified Six Sigma Black Belt MCQ 2

Question 1

Which chart is BEST suited for monitoring the proportion of defective items in samples of varying size?

Accepted Answer

p-chart

Answer

The p-chart tracks the proportion of nonconforming units and accommodates variable sample sizes.

Question 2

In Design of Experiments, what does a 2^(k-p) notation represent?

Accepted Answer

Fractional factorial design with k factors and p generators

Answer

2^(k-p) denotes a fractional factorial where k is the number of factors and p defines the fraction (2^-p).

Question 3

A process has Cp = 1.5 but Cpk = 0.9. What does this indicate?

Accepted Answer

The process has adequate spread but is off-center

Answer

Cp > Cpk indicates the process has sufficient potential capability but the mean is not centered between specification limits.

Question 4

Which hypothesis test is appropriate when comparing the variances of two independent normal populations?

Accepted Answer

F-test (Levene's or Bartlett's)

Answer

The F-test compares two population variances; Levene's or Bartlett's tests are common implementations.

Question 5

In a SIPOC diagram, what does the 'S' represent?

Accepted Answer

Suppliers

Answer

SIPOC stands for Suppliers, Inputs, Process, Outputs, Customers — Suppliers provide the inputs to the process.

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