{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ch13test - Chapter 13 Quality Control and Improvement...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 13 Quality Control and Improvement True/False Questions 1. When using control charts, it is assumed that the variable in question is at least approximately normally distributed. Answer: True Type: Concept Difficulty: Easy 2. When an observation is outside the control limits of a control chart, the process is said to be in control. Answer: False Type: Concept Difficulty: Easy 3. A process is considered to be in control, statistically, when the only variation present is due to natural variation. Answer: True Type: Concept Difficulty: Easy 4. A control is useful since it detects both types of variation, that due to assignable causes and that due to natural variation. Answer: False Type: Concept Difficulty: Easy 5. The most important idea in statistical quality control is that of the variance. Answer: True Type: Concept Difficulty: Easy 6. A Pareto diagram is used by management to help detect significant problems in the process. Answer: True Type: Concept Difficulty: Easy 7. Acceptance sampling is used to directly improve the quality of products. Answer: False Type: Concept Difficulty: Easy 8. Taguchi methods aim at producing the optimal value for a parameter in a production process. Answer: True Type: Concept Difficulty: Easy 232 Aczel, Complete Business Statistics, Sixth Edition
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Chapter 13 Quality Control and Improvement 9. In an actual quality control program, the first test would be to detect shifts in the population mean. Answer: False Type: Concept Difficulty: Medium 10. The idea of an x-bar chart is the same as the idea of confidence limits on the mean. Answer: True Type: Concept Difficulty: Medium 11. The center-line of the x-bar chart is the grand mean of all the observations. Answer: True Type: Concept Difficulty: Medium 12. In the x-bar chart analysis, s is used to estimate only when n is at least 30. Answer: False Type: Concept Difficulty: Medium 13. It is important in quality control, to keep the variance as large as possible. Answer: False Type: Concept Difficulty: Easy 14. The lower limit of the R chart is bounded by zero. Answer: True Type: Concept Difficulty: Easy 15. The distribution of the sample range is normal. Answer: False Type: Concept Difficulty: Medium 16. If all sample ranges are within bounds on an R chart, the process is said to be in control. Answer: True Type: Concept Difficulty: Easy 17. The binomial distribution is never symmetric. Answer: False Type: Concept Difficulty: Easy 18. The central limit theorem is the rationale behind the control chart for p. Answer: True Type: Concept Difficulty: Medium 233 Aczel, Complete Business Statistics, Sixth Edition
Image of page 2
Chapter 13 Quality Control and Improvement 19. In the Poisson distribution, the mean and the variance are equal. Answer: True Type: Concept Difficulty: Medium 20. An x chart is another name for an x-bar chart.
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern