Six Sigma Six Sigma Certifications CLSSBB Questions & Answers

• Question 381:

  An advantage of using standard deviation rather than range for measuring dispersion of a large sample is that:

  A. standard deviation has a simpler formula

  B. calculators have a standard deviation key but not a range key

  C. standard deviation uses information from each measurement

  D. range calculations are not normally distributed

  Correct Answer: C

• Question 382:

  Data are collected in xy pairs and a scatter diagram shows the points are grouped very close to a straight line that tips down on its right hand end. A reasonable value for the coefficient of correlation is:

  A. 0.8

  B. 0

  C. -0.9

  D. 1

  E. 1.3

  F. -1.8

  Correct Answer: C

• Question 383:

  The mean of a Poisson distribution is 2.94. It's variance is:

  A. Not enough information is given

  B. 1.71

  C. 8.64

  D. 74.7

  E. 1.31

  Correct Answer: C

  Explanation: The correct answer is C because the mean of poisson distribution is 2.94, hence the variance would be 8.64 U = variance = 2

• Question 384:

  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

  Correct Answer: A

  Explanation: The variance formula will be used for calculating the estimated variance of the given data. The formula is: N = 7

  

  = 2.77

  

  (x

  )2

• Question 385:

  The distribution is:

  A. symmetric

  B. left skewed

  C. right skewed

  D. normal

  E. uniform

  Correct Answer: C

• Question 386:

  Quality Function Deployment is a tool to aid in:

  A. analyzing non-paired data

  B. determining if quality procedures being followed on the shop floor

  C. ascertaining which processes are functioning correctly

  D. linking customer requirements to product features E. all of the above F. none of the above

  Correct Answer: D

• Question 387:

  A process produced 1394 units. During this time 11 defects were detected. The Rolled Throughput Yield ( RTU) is approximately:

  A. 0.992

  B. 7.89

  C. 0.00789

  D. 1.008

  E. all of the above

  F. none of the above

  Correct Answer: A

• Question 388:

  A project whose definition does not include performance metrics:

  A. will typically be short term

  B. use statistical inference

  C. have a high risk of failure

  D. should not be approved

  E. none of the above

  Correct Answer: D

• Question 389:

  An important step in determining the VOC is:

  A. establish viable or comprehensive process feedback loops

  B. ascertain the principles that are values of the corporation

  C. identify the customer

  D. measure the virtual operating continuum potential

  E. all of the above

  F. none of the above

  Correct Answer: C

• Question 390:

  Dr. Joseph M. Juran:

  A. lectured in Japan after World War II

  B. was an author of several books in the US

  C. lectured widely in the US

  D. is considered an expert is the quality field

  E. all of the above

  F. none of the above

  Correct Answer: E