Exam 19: Statistical Process Control and Quality Management

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, ΣX = 15,350 and ΣR = 411.4. What is the sample size?

(Multiple Choice)

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Question 41

A manufacturer of golf club shafts inspects 50 shafts every day. Over the last ten days, the number of defective shafts has been reported to be the following. To construct a process control chart for the mean percent defective, what is the upper control limit?

(Essay)

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Question 42

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is X-bar for 7 pm?

(Multiple Choice)

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Question 43

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the value of A₂, the control limit factor for averages?

(Multiple Choice)

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Question 44

If the binomial distribution is used to develop an operating characteristic curve for an acceptance sampling plan, then the trials must be ________________.

(Short Answer)

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Question 45

An airline is investigating the causes of lost bags. The following table of data was collected over the last six months. What is the reason with the lowest percentage of bags is lost, and what is the percentage?

(Essay)

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Question 46

The concepts of statistical quality control developed in the decade of the ______.

(Short Answer)

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Question 47

A sampling plan states that if 20 incoming transistors are checked and 2 or less defects are found, the lot is accepted. If an incoming lot is 10 percent defective, what is the probability of accepting the lot of transistors?

(Multiple Choice)

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Question 48

Which of the following statements about in-control and out-of-control processes are true? I. The mean chart and range chart always show that processes are in control. II) A mean chart can be in control, while a range chart can be out of control. III) A mean chart can be out of control, while a range chart can be in control.

(Multiple Choice)

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Question 49

In acceptance sampling, usually 100% of the incoming lot is checked.

(True/False)

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Question 50

Over the last ten days, a manufacturer of cell phones counts the number of defective phones created in each eight-hour shift. The results are shown next. To construct a process control chart for the mean number defective, what is the lower control limit?

(Essay)

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Question 51

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. Over the last hundred sample means, one sample mean was outside a control limit. The chart shows:

(Multiple Choice)

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Question 52

The Quality Assurance Department selected 12 samples of 100 printed circuit boards and tested them. The number of defective printed circuit boards in each sample was 3, 3, 0, 5, 1, 1, 5, 6, 6, 2, 0, and 1. What kind of control chart should be constructed to monitor the process?

(Multiple Choice)

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Question 53

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. Over the last hundred sample means, one sample mean was outside a control limit. The process is:

(Multiple Choice)

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Question 54

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, ΣX = 15,350 and ΣR = 411.4. To construct a mean chart, what is the lower control limit (LCL) for the mean?

(Multiple Choice)

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Question 55

In a fishbone diagram, "dissatisfied customers" would be an _ and "slow service" would be a _.

(Short Answer)

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Question 56

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the mean range?

(Multiple Choice)

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Question 57

A new machine used in the production of motor mount bolts was put into operation. Five samples of size 100 were randomly selected and the number of defectives in each sample was noted. The measurement of quality is based on:

(Multiple Choice)

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Question 58

Quality control charts indicate whether a production process is in control or out of control.

(True/False)

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Question 59

What process investigates the potential causes of an outcome or effect such as poor quality?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 136

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, ΣX = 15,350 and ΣR = 411.4. What is the sample size?

A manufacturer of golf club shafts inspects 50 shafts every day. Over the last ten days, the number of defective shafts has been reported to be the following. To construct a process control chart for the mean percent defective, what is the upper control limit?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is X-bar for 7 pm?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the value of A₂, the control limit factor for averages?

If the binomial distribution is used to develop an operating characteristic curve for an acceptance sampling plan, then the trials must be ________________.

An airline is investigating the causes of lost bags. The following table of data was collected over the last six months. What is the reason with the lowest percentage of bags is lost, and what is the percentage?

The concepts of statistical quality control developed in the decade of the ______.

A sampling plan states that if 20 incoming transistors are checked and 2 or less defects are found, the lot is accepted. If an incoming lot is 10 percent defective, what is the probability of accepting the lot of transistors?

In acceptance sampling, usually 100% of the incoming lot is checked.

Over the last ten days, a manufacturer of cell phones counts the number of defective phones created in each eight-hour shift. The results are shown next. To construct a process control chart for the mean number defective, what is the lower control limit?

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. Over the last hundred sample means, one sample mean was outside a control limit. The chart shows:

The Quality Assurance Department selected 12 samples of 100 printed circuit boards and tested them. The number of defective printed circuit boards in each sample was 3, 3, 0, 5, 1, 1, 5, 6, 6, 2, 0, and 1. What kind of control chart should be constructed to monitor the process?

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. Over the last hundred sample means, one sample mean was outside a control limit. The process is:

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, ΣX = 15,350 and ΣR = 411.4. To construct a mean chart, what is the lower control limit (LCL) for the mean?

In a fishbone diagram, "dissatisfied customers" would be an _ and "slow service" would be a _.

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the mean range?

A new machine used in the production of motor mount bolts was put into operation. Five samples of size 100 were randomly selected and the number of defectives in each sample was noted. The measurement of quality is based on:

Quality control charts indicate whether a production process is in control or out of control.

What process investigates the potential causes of an outcome or effect such as poor quality?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

Exam 19: Statistical Process Control and Quality Management

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, ΣX = 15,350 and ΣR = 411.4. What is the sample size?

A manufacturer of golf club shafts inspects 50 shafts every day. Over the last ten days, the number of defective shafts has been reported to be the following. To construct a process control chart for the mean percent defective, what is the upper control limit?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is X-bar for 7 pm?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the value of A2, the control limit factor for averages?

If the binomial distribution is used to develop an operating characteristic curve for an acceptance sampling plan, then the trials must be ________________.

An airline is investigating the causes of lost bags. The following table of data was collected over the last six months. What is the reason with the lowest percentage of bags is lost, and what is the percentage?

The concepts of statistical quality control developed in the decade of the ______.

A sampling plan states that if 20 incoming transistors are checked and 2 or less defects are found, the lot is accepted. If an incoming lot is 10 percent defective, what is the probability of accepting the lot of transistors?

In acceptance sampling, usually 100% of the incoming lot is checked.

Over the last ten days, a manufacturer of cell phones counts the number of defective phones created in each eight-hour shift. The results are shown next. To construct a process control chart for the mean number defective, what is the lower control limit?

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. Over the last hundred sample means, one sample mean was outside a control limit. The chart shows:

The Quality Assurance Department selected 12 samples of 100 printed circuit boards and tested them. The number of defective printed circuit boards in each sample was 3, 3, 0, 5, 1, 1, 5, 6, 6, 2, 0, and 1. What kind of control chart should be constructed to monitor the process?

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. Over the last hundred sample means, one sample mean was outside a control limit. The process is:

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, ΣX = 15,350 and ΣR = 411.4. To construct a mean chart, what is the lower control limit (LCL) for the mean?

In a fishbone diagram, "dissatisfied customers" would be an _________ and "slow service" would be a _________.

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the mean range?

A new machine used in the production of motor mount bolts was put into operation. Five samples of size 100 were randomly selected and the number of defectives in each sample was noted. The measurement of quality is based on:

Quality control charts indicate whether a production process is in control or out of control.

What process investigates the potential causes of an outcome or effect such as poor quality?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the value of A₂, the control limit factor for averages?

In a fishbone diagram, "dissatisfied customers" would be an _ and "slow service" would be a _.