1-20chapter stats

Model 2 is most accurate because it has the smallest

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Unformatted text preview: between the estimated process mean and the specification limit closest to the estimated process mean. True False 8. A goal of statistical process control is continuous process improvement. True False 9. For a given control chart, zone boundaries consist of UCL and LCL. True False 10. Unusual sources of variation that can be attributed to specific causes are called the common causes of process variation. True False 11. When using and R charts to analyze and improve a process, first, the chart is analyzed and the necessary action(s) to correct assignable causes of variation is (are) taken before the R chart is analyzed. True False 12. Cause and effect diagram enumerates the potential causes of an undesirable effect on the process to discover sources of process variation and to identify opportunities for process improvement. True False 13. How well a process is able to meet the requirements set forth by the process design is called the quality of design. True False 1-1664 Chapter 01 - An Introduction to Business Statistics 14. How well the design of the product meets and exceeds the needs and expectations of the customers is called the quality of performance. True False 15. A sequence of steadily decreasing points on a control chart is called run down. True False 16. If a manufacturing process is in statistical control, it means that the process is capable of producing products that meets the customer's needs. True False 17. If a process is only influenced by common causes of variation, we can state that the process is in statistical control. True False 18. Control charts are used to reduce common causes of variation. True False 19. If a process is stable and in statistical control, it is not influenced by assignable causes of variation. True False 20. Reducing common causes of variation usually requires action by management. True False 21. If a company is using an chart for a given process with measurement data, it is generally not important or necessary to use an R or s chart. True False 1-1665 Chapter 01 - An Introduction to Business Statistics 22. Common causes of variation represent the inherent variability of a given process. True False Multiple Choice Questions 23. When employing measurement data to study a process, the _______ monitors the process variation. A. chart B. R chart C. p chart D. natural tolerance E. pattern analysis 24. _______ chart monitors the number of nonconformities units in a subgroup. A. B. R C. C D. P 25. Which one of the following control charts is designed to control the proportion of nonconforming units? A. p-charts B. chart C. R-chart 26. When employing measurement data to study a process, the ______ monitors the process mean. A. chart B. p-bar-chart C. R chart D. Natural tolerance E. Pattern analysis 1-1666 Chapter 01 - An Introduction to Business Statistics 27. If the process variability steadily increases, we would observe A. An alternating pattern of high value followed by a low value on the R-chart. B. An upward trend on the R-chart. C. A downward trend on the R-chart. D. An increasing gradual funnel pattern on the R-chart. E. A decreasing gradual funnel pattern on the R-chart. 28. Rational subgrouping allows us to detect changes _____ subgroups. A. Within B. Between C. In the sizes of D. None of the above 29. Observing the output of a process at fixed time intervals is referred to as _____ sampling. A. Consecutive B. Random C. Fixed D. Periodic 30. How well a process is able to meet the requirements set forth by the process design is called A. Process leeway B. Quality of conformance C. Quality of performance D. Quality of design 31. How well the design of a product or service meets and exceeds the needs and expectations of the customer is called A. Process capability B. Quality of conformance C. Quality of performance D. Quality of design E. Process control 1-1667 Chapter 01 - An Introduction to Business Statistics 32. How well a product or service performs in the marketplace is called: A. Process capability B. Quality of conformance C. Quality of performance D. Quality of design E. Process control 33. As the standard deviation of a process ___________, the process capability measured by Cpk________. A. Decreases, decreases B. Increases, increases C. Decreases, increases D. None of the above 34. If a control chart is used correctly, and the necessary corrective actions are taken, as the control limits get _______, the potential quality of the product _____________. A. Looser, increases B. Tighter, decreases C. Tighter, increases D. None of the above 35. Consider two processes. Process 1's mean is equal to its target (nominal) value, while the process 2's mean is not equal to its target value. The Cpkvalue for process 1 will _____, Cpkvalue for process 2. A. Always be larger than B. Always be the same as C. Always be smaller than D. Sometimes be larger than E. Sometimes be smaller than 1-1668 Chapter 01 - An Introduction to Business Statistics 36. In a manufacturing process, if the limits for a control chart are set too _____________, the risk of not investigating a special cause of variation and possibly not taking a corrective action ______...
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