Sigma questions

timer Asked: Mar 30th, 2013

Question Description

1.  Which of the following is a good example of a Poisson distribution.

A.  Perfect defective in a lot

B.  Number of people living in large metropolina area

C.  Number of hurricane per season in the Atlantic

D.  None of the above

2.  You wish to track the percent defective on shipment of raw material from a vendor what type of control chart would you use.

A.  P- Chart

B.  IMR Chart

C.  U- Chart

D.  C- Chart

3.  Within a rational subgroup, when> 1 what type of variation would you expert.

A.  Both within and between variation

B.  Within variation

C.  Between Variation

D.  Convariance

4.  In a statlistically valid survey about the Kennedy assassination there was a conspiracy.  If the sample statistic proportion for the response "true" for the question was  54.57% and it's 95% confidence that the majority of people agreed with the conspiracy theory.

A.  True

B. False

5.  The main purpose of a control chart is:

A.  Plot the process over time

B. Show the process has statistically changed

C. Distinguish between special and common cause

D. Show the process is in statiscal control

6. If you are measuring and tracking the high level matric of market share, what type of chart would you use.

A. P- Chart

B.   IMR Chart

C.   Run Chart

D.   EWWA or Cusum control chart

7. In order for a lean six sigma team to understand the resistancethat members of an organization may have for a proposed recommendation and change, what tool would be most helpful.

A.   Nominal Group Tecnique

B. Mindmapping

C. Brainstorming

D. Force Field analysis

8.   What type of factors should be in a control plan?

A.   The statistical analysis of the project

B. The project leader's contact info if the process goes out of control again

C. Operational defintra of the imput and/ or output

D. All of the above

9.   When using a multivariate control chart what are some of the disadvantages of using control ellipse.

A. You loose the time sequency in this chart

B.  It becomes very difficult with more than two variables

C.   You cannot determine which factor cause the out of control condition

D.   All of the above

E. A and B

10. You want to track the syntax error per 1000 lines of code written.  What type of control chart would be available to you?

A. NP Chart

B. P Chart

C. C Chart

D. U and C chart

11. When you change the confidence level from 95 % to 99% the confidence intervals get smaller you have a higher confidence.

A. True

B.   False

12. If you reject the nulkl hypothesis when in reality it was true, you have committed a:

A.  Type I error

B. Type II error

C. Faux pas

D. A and B

13. What chart or charts could you use if you wanted to detect a small shift, less than 1.5 in the means.

A. Cusum

B. I & MR


D. All of the above

14.   The average run length (ARL) for a Shewart Control Chart while the process is still in control is?

A.   1/P

B. 1/alpha

C. 1/Beta

D. 1/(1-P)

15.   What is the percent defective if you have a one-sided specification and your standard normal variable Z is zero?

A. < 10 %

B.   > 90 %

C.   About  25%

D.   50 %

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