Exam 6: Statistical Quality Control

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Upper and lower control limits are usually set at how many standard deviations from the mean?

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When should 100% inspection be used?

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What is the formula for an R chart's center line?

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What are the two aspects to implementing the six-sigma concept?

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For the standard normal distribution, how much confidence is provided within 2 standard deviations above and below the mean?

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If the upper control limit for a c-chart is 28 and the lower control limit is 4, what is the average number of defects per sample?

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Consumers willingly accept defects if ________________________.

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What is the formula for the process capability index Cp?

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What is the only service company to have won the Malcolm Baldrige National Quality Award twice?

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What is the upper control limit for a c-chart if the total defects found over 200 samples equals 32?

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Julia has been assigned to develop a new product design specifications. Manufacturing has stated that the system must have a capability index of 1.2 when the product standard deviation is 1.3. What is the specification range limits?

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A variable is a product characteristic that has a discrete value and can be counted.

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Common causes of variation are also known as __________________________.

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What is the formula for the sample standard deviation?

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Two areas of operations management that are particularly affected by the decision to increase the level of quality and reduce the number of product defects are ____ and ___ ___

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Each day for two workweeks (10 days total), George weighs 4 bags from that day's production. If the average of the means is 14 oz. and the average range is 0.4 oz., what is the lower control limit for an x-bar chart for this process?

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Suppose that you want to measure the percentage of candles that are cut longer than 9 inches. Which control chart would be appropriate?

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Describe the two aspects to implementing the six-sigma concept.

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The probability of rejecting a lot or batch of products whose proportion of defective items is not greater than AQL is called producer's risk because ____________________.

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Cans of soup are supposed to weigh exactly 16 oz. Inspectors want to develop process control charts. They take eight samples of five boxes and weigh them. They obtain the following data: Cans of soup are supposed to weigh exactly 16 oz. Inspectors want to develop process control charts. They take eight samples of five boxes and weigh them. They obtain the following data:

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