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27. let X-52.5, 8-2.5, n25. Assuming statistical control, and a normal distribution for the population parameters, what proportion of the population will meet specifications of
27. let X-52.5, 8-2.5, n25. Assuming statistical control, and a normal distribution for the population parameters, what proportion of the population will meet specifications of 50: 3.0? A. 0.066 B. 0.349 C. 0.434 D. 0.500 E 0.565 28. The brightness of projector lamps is being monitored. Brightness (luminosity is measured in lumens. The quoted brightness of these lamps is 1,000 lumens. Each hour 5 lamps are sampled from production and measured for their luminosity. They are using X-bar and R charts to control the process. Twenty samples of five each are taken with the following results:X1,044 lumens and R=326 lumens. What is the population standard deviation of the luminosity of these lamps? A. 6.6 lumens B 140 lumens C. 20 lumens D. 32.6 lumens E 44.7 lumens 29. When using Xbar-R control charts to determine if the process is under statistical control the chart should be drawn first to identify special causes, take remedial actions, and then build the bar chart. A. True B) False 30. Six-sigma processes are characterized for having: A 422 B. C226 C. A process spread of 12 sigma. D. 6-sigma control limits E. Many nonconforming items. 31. Specifications are for: A. Both individual items and sample means. B. Neither individual items nor sample means. C. Sample means. D. Individual items. E. Sample ranges 32. A manufacturing company produces bolts. The mean length of bolts produced in the company is known to be 30 mm with a standard deviation of 0.05 mm. If the specification limits for bolts are 30mm -0.12 what is the Cp of the process: A. 0.8 B. 0.4 c. 1.2 D. 1.0 E. Not given 33. A sales person representing a manufacturing company that is supplying your company with a component says that since all of the points on the X-bar and R-charts for the process under discussion are in control they cannot be shipping any parts out of specifications to you. This sales person's statement is: A. True B. False 34. If we use acceptance sampling, we may reject good lots. A) True B) False 27. let X-52.5, 8-2.5, n25. Assuming statistical control, and a normal distribution for the population parameters, what proportion of the population will meet specifications of 50: 3.0? A. 0.066 B. 0.349 C. 0.434 D. 0.500 E 0.565 28. The brightness of projector lamps is being monitored. Brightness (luminosity is measured in lumens. The quoted brightness of these lamps is 1,000 lumens. Each hour 5 lamps are sampled from production and measured for their luminosity. They are using X-bar and R charts to control the process. Twenty samples of five each are taken with the following results:X1,044 lumens and R=326 lumens. What is the population standard deviation of the luminosity of these lamps? A. 6.6 lumens B 140 lumens C. 20 lumens D. 32.6 lumens E 44.7 lumens 29. When using Xbar-R control charts to determine if the process is under statistical control the chart should be drawn first to identify special causes, take remedial actions, and then build the bar chart. A. True B) False 30. Six-sigma processes are characterized for having: A 422 B. C226 C. A process spread of 12 sigma. D. 6-sigma control limits E. Many nonconforming items. 31. Specifications are for: A. Both individual items and sample means. B. Neither individual items nor sample means. C. Sample means. D. Individual items. E. Sample ranges 32. A manufacturing company produces bolts. The mean length of bolts produced in the company is known to be 30 mm with a standard deviation of 0.05 mm. If the specification limits for bolts are 30mm -0.12 what is the Cp of the process: A. 0.8 B. 0.4 c. 1.2 D. 1.0 E. Not given 33. A sales person representing a manufacturing company that is supplying your company with a component says that since all of the points on the X-bar and R-charts for the process under discussion are in control they cannot be shipping any parts out of specifications to you. This sales person's statement is: A. True B. False 34. If we use acceptance sampling, we may reject good lots. A) True B) False
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