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A 176 b 151 c 255 d 045 114 a bank officer wishes

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Unformatted text preview: ating. The specification limits for the plastic coating are 30 and 70. From time to time the plastic coating can become uneven. Therefore, in order to keep the coating as even as possible, thickness measurements are periodically taken at four different locations on the window. 15 subgroups were observed and each subgroup consists of the four thickness measurements taken across the windows at a particular time with the following results: mean of the means = and the average range of 8.85. Is the process capable of meeting the specifications? A. Yes B. No 1-1694 = 50.05 Chapter 01 - An Introduction to Business Statistics 123. A manufacturer of windows produces one type that has a plastic coating. The specification limits for the plastic coating are 30 and 70. From time to time the plastic coating can become uneven. Therefore, in order to keep the coating as even as possible, thickness measurements are periodically taken at four different locations on the window. 15 subgroups were observed and each subgroup consists of the four thickness measurements taken across the windows at a particular time with the following results: mean of the means = = 50.05 and the average range of 8.85. Find the sigma level capability of the process. A. 4.64 B. 4.66 C. 7.83 D. 2.25 1-1695 Chapter 01 - An Introduction to Business Statistics Chapter 17 Process Improvement Using Control Charts Answer Key True / False Questions 1. A control chart is a graph whose purpose is to detect assignable causes of variation in a process. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 4 Topic: Control Charts 2. An chart is a control chart on which individual process measurements are plotted versus time. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 4 Topic: X-bar Control Charts 1-1696 Chapter 01 - An Introduction to Business Statistics 3. A range chart is a control chart in which ranges between individual process measurements within subgroup are plotted. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 4 Topic: Range Control Charts 4. A p-chart is a control chart on which the proportions of nonconforming units are plotted versus time. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 7 Topic: P-Chart Control Charts 5. Process leeway is the distance between natural tolerance limits and control limits. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 6 Topic: Process capability 1-1697 Chapter 01 - An Introduction to Business Statistics 6. Periodic sampling is observing the output of a process at random intervals. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Process sampling 7. Sigma level capability is the number of estimated process standard deviations between the estimated process mean and the specification limit closest to the estimated process mean. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 6 Topic: Process capability 8. A goal of statistical process control is continuous process improvement. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Learning Objective: 1 Topic: Statistical process control 9. For a given control chart, zone boundaries consist of UCL and LCL. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 5 Topic: Control Charts 1-1698 Chapter 01 - An Introduction to Business Statistics 10. Unusual sources of variation that can be attributed to specific causes are called the common causes of process variation. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Learning Objective: 2 Topic: Process variation 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. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 4 Topic: Process variation 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 AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 8 Topic: Process variation 13. How well a process is able to meet the requirements set forth by the process design is called the quality of design. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Process quality 1-1699 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. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Process quality 1...
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This document was uploaded on 01/20/2014.

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