Exam 14: Statistical Methods for Quality Control

Harry Coates wants to construct and R charts at the bag-filling operation for Meow Chow cat food. He knows that when the filling operation is functioning correctly, bags of cat food should average 50.00 pounds and 5-bag samples should have an average range of .330 pounds. Harry had twenty 5-bag samples taken at 2-hour intervals and the sample means and ranges are shown below. Determine the center lines and upper and lower control limits for the and R charts.

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Question 21

Variation in the quality of production output that is due to factors such as machine tools wearing out is called

(Multiple Choice)

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Question 22

A group of items such as incoming shipments of raw material is called

(Multiple Choice)

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Question 23

Quality assurance consists of

(Multiple Choice)

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Question 24

When a Motorola executive said "That evaluation is …. perhaps the most cost-effective, value-added business consultation available anywhere in the world today" he was referring to

(Multiple Choice)

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Question 25

A control chart that is used to monitor the range of the measurements in a sample is

(Multiple Choice)

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Question 26

Snipper, Inc. manufactures lawnmowers that require minor, final assembly by the customer. A sealed plastic bag containing the hardware (nuts, bolts, washers, and so on) needed for final assembly is included with each lawnmower shipped. During a week of normal, in-control operation, twenty samples of 200 bags of hardware were examined for content (hardware type and count) accuracy. A total of 104 bags of the 4000 examined failed to have the correct contents. a. Compute the upper limit, center line, and lower limit for a p chart. b. Compute the upper limit, center line, and lower limit for an np chart.

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Question 27

In practice, it is common to use the sample _ to estimate the process _____.

(Multiple Choice)

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Question 28

Heavy emphasis on statistical analysis and careful measurement are closely associated with

(Multiple Choice)

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Question 29

A graphical tool used to help determine whether a process is in control or out of control is a

(Multiple Choice)

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Question 30

The following data represent the filling weights based on samples of 14.5 ounce cans of whole peeled tomatoes. Ten samples of size 5 were taken. Use Excel to develop an x-bar chart.

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Question 31

The two general classifications of attributes in quality control are

(Multiple Choice)

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Question 32

The upper and lower control limits of a process are 66 and 54. Samples of size 16 are used for the inspection process. Determine the mean and the standard deviation for this process.

(Short Answer)

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Question 33

The following data represent the filling weights based on samples of 14.5 ounce cans of whole peeled tomatoes. Ten samples of size 5 were taken. Use Excel to develop an R chart.

(Essay)

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Question 34

An operating characteristic curve is based on a ________ probability distribution.

(Multiple Choice)

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Question 35

__________ consist(s) of making a series of inspections and measurements to determine whether quality standards are being met.

(Multiple Choice)

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Question 36

A U.S. manufacturer of digital video recorders purchases a circuit board from a Taiwanese firm. The circuit boards are shipped in lots of 2000. The acceptance sampling procedure uses 12 randomly selected circuit boards. The acceptance number is 1. If p₀ is .03 and p₁ is .20, what are the producer's and consumer's risks for this plan?

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Question 37

Control charts based on data that can be measured on a continuous scale are called

(Multiple Choice)

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Question 38

To inspect incoming shipments of components, a manufacturer is considering samples of sizes 12, 15, and 18. Use binomial probabilities to select a sampling plan that provides a producer's risk of  = .12 when p₀ is .04 and a consumer's risk of  = .08 when p₁ is .25.

(Short Answer)

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Question 39

Brakes Shop, Inc., is a franchise that specializes in repairing brake systems of automobiles. The company purchases brake shoes from a national supplier. Currently, lots of 1,000 brake shoes are purchased, and each shoe is inspected before being installed on an automobile. The company has decided, instead of 100% inspection, to adopt an acceptance sampling plan. a.Explain what is meant by the acceptance sampling plan. b.If the company decides to adopt an acceptance sampling plan, what kinds of risks are there? c.The quality control department of the company has decided to select a sample of 10 shoes and inspect them for defects. Furthermore, it has been decided that if the sample contains no defective parts, the entire lot will be accepted. If there are 50 defective shoes in a shipment, what is the probability that the entire lot will be accepted? d.What is the probability of accepting the lot if there are 100 defective units in the lot?

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Question 40

Showing 21 - 40 of 72

Variation in the quality of production output that is due to factors such as machine tools wearing out is called

A group of items such as incoming shipments of raw material is called

Quality assurance consists of

When a Motorola executive said "That evaluation is …. perhaps the most cost-effective, value-added business consultation available anywhere in the world today" he was referring to

A control chart that is used to monitor the range of the measurements in a sample is

In practice, it is common to use the sample _ to estimate the process _____.

Heavy emphasis on statistical analysis and careful measurement are closely associated with

A graphical tool used to help determine whether a process is in control or out of control is a

The following data represent the filling weights based on samples of 14.5 ounce cans of whole peeled tomatoes. Ten samples of size 5 were taken. Use Excel to develop an x-bar chart.

The two general classifications of attributes in quality control are

The upper and lower control limits of a process are 66 and 54. Samples of size 16 are used for the inspection process. Determine the mean and the standard deviation for this process.

The following data represent the filling weights based on samples of 14.5 ounce cans of whole peeled tomatoes. Ten samples of size 5 were taken. Use Excel to develop an R chart.

An operating characteristic curve is based on a ________ probability distribution.

__________ consist(s) of making a series of inspections and measurements to determine whether quality standards are being met.

Control charts based on data that can be measured on a continuous scale are called

To inspect incoming shipments of components, a manufacturer is considering samples of sizes 12, 15, and 18. Use binomial probabilities to select a sampling plan that provides a producer's risk of  = .12 when p₀ is .04 and a consumer's risk of  = .08 when p₁ is .25.

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Time Series Analysis and Forecastng

Filters

Exam 14: Statistical Methods for Quality Control

Variation in the quality of production output that is due to factors such as machine tools wearing out is called

A group of items such as incoming shipments of raw material is called

Quality assurance consists of

When a Motorola executive said "That evaluation is …. perhaps the most cost-effective, value-added business consultation available anywhere in the world today" he was referring to

A control chart that is used to monitor the range of the measurements in a sample is

In practice, it is common to use the sample _____ to estimate the process _________.

Heavy emphasis on statistical analysis and careful measurement are closely associated with

A graphical tool used to help determine whether a process is in control or out of control is a

The following data represent the filling weights based on samples of 14.5 ounce cans of whole peeled tomatoes. Ten samples of size 5 were taken. Use Excel to develop an x-bar chart.

The two general classifications of attributes in quality control are

The upper and lower control limits of a process are 66 and 54. Samples of size 16 are used for the inspection process. Determine the mean and the standard deviation for this process.

The following data represent the filling weights based on samples of 14.5 ounce cans of whole peeled tomatoes. Ten samples of size 5 were taken. Use Excel to develop an R chart.

An operating characteristic curve is based on a ________ probability distribution.

__________ consist(s) of making a series of inspections and measurements to determine whether quality standards are being met.

Control charts based on data that can be measured on a continuous scale are called

To inspect incoming shipments of components, a manufacturer is considering samples of sizes 12, 15, and 18. Use binomial probabilities to select a sampling plan that provides a producer's risk of  = .12 when p0 is .04 and a consumer's risk of  = .08 when p1 is .25.

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Time Series Analysis and Forecastng

Filters

In practice, it is common to use the sample _ to estimate the process _____.

To inspect incoming shipments of components, a manufacturer is considering samples of sizes 12, 15, and 18. Use binomial probabilities to select a sampling plan that provides a producer's risk of  = .12 when p₀ is .04 and a consumer's risk of  = .08 when p₁ is .25.