Iibm - Six Sigma Black Belt

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Six Sigma Black Belt

Multiple Choices:

Q1. Calculate the estimated variance of the population from which the following values have been randomly selected: 2.8 2.7 2.6 2.9 2.8 2.8 2.8.

a. 095

b. 009

c. 088

d. 008

Q2. The mean, median and mode of a distribution have the same value. What can be said about the distribution?

a. It is exponential

b. It is normal

c. It is uniform

d. None of the above

Q3. Approximately what percent of the data values are smaller than the mean?

a. 25%

b. 50%

c. 75%

d. None of above

Q4. A normal probability plot is used to:

a. Determine whether the distribution is normal

b. Plot Z value

c. Determine process capability

d. It percent out of specification

Q5. Nominal Group technique is used to:

a. Help a group reach consensus

b. Generate a group on new ideas

c. Provide a consistent stable group leadership

d. Provide a name for the group

Q6. An example of a project metric would be:

a. The decrease in defect occurrence

b. The decrease in product cost

c. The decrease in cycle time

d. All the above

Q7. A correct statement about the relationship between the terms parameter and statistic is:

a. A population statistic is more accurate than a parameter

b. A sample parameter is used to estimate a statistic

c. A sample statistic is used to estimate a population parameter

d. Standard deviation calculation requires both statistics and parameters

Q8. A and B are events. P(A) = 0.80 and P(B) = 0.90:

a. Events A and B are disjoint or mutually exclusive

b. Events A and B are not disjoint or mutually exclusive

c. P (A and B) = 0

d. P(A and B) = 1.7

Q9. In a certain sampling situation, a=0, b=0.08. the power of the sampling plan this case is:

a. 0

b. 0.08

c. 1.00...