If the chance that any one of five telephone lines is busy at any instant is 0.01, then what is the probability that all the lines are busy? A. (0.01)^4 B. (0.01)^5 C. (0.01)^6 D. (0.01)^10 N = 5, p = 0.01, x = 5 Apply Standard formula for Binomial Distribution. Thus, option b is the correct answer. Who should complete the control phase after the successful completion and implementation of the first four phases of DMAIC? A. The green belt alone; the project has been successfully completed. B. The process owner alone; it is his responsibility to take the project from here. C. The process owner and the Green Belt together should complete the control phase. D. The complete team is the most desirable option. The control phase should be completed by the entire team. Control is not an insignificant phase of the DMAIC process. The green belt or the process owner alone may not have the ability and knowledge to structure the last control step. So option d is correct. To increase the power of the experiments, what is the best choice in the hands of a Six Sigma team? A. Increase Sample Size B. Reduce Sample Size C. Reduce Significance level D. All of the above Options b and c are not serious considerations, and thus option d can be ruled out. Conceptually, increase in sample size increases the possible accuracy of the experiment, and thus an increase in power. So, option a is the correct answer.