Question 1

For a given control chart,zone boundaries consist of the UCL and LCL.

Accepted Answer

A) True 
 B)False  False

Question 2

How well a product or a service performs in the marketplace is called the quality of ______________.

Accepted Answer

A) performance 
B) conformance 
C) design 
D) control 
A) performance 
B) conformance 
C) design 
D) control A

Question 3

Control charts are used to reduce common causes of variation.

Accepted Answer

A) True 
 B)False  False

Question 4

A systematic method for analyzing process data in which we monitor process variation is called ______________.

Accepted Answer

A) control charting 
B) sigma level capability 
C) statistical process control 
D) rational subgrouping 
A) control charting 
B) sigma level capability 
C) statistical process control 
D) rational subgrouping

Question 5

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 ± .006 inches.If the process mean is 2.001 and the process standard deviation is .0016,determine the estimated standard deviations of the leeway for this process.

Accepted Answer

A) .0016 
B) .0048 
C) 1.375 
D) .125 
A) .0016 
B) .0048 
C) 1.375 
D) .125

Question 6

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,each consisting of four thickness measurements,with the following results: mean of the means =   = 50.05,and average range = 8.85.Calculate the center line for the X-bar chart.

Accepted Answer

A) 50.05 
B) 8.85 
C) 4.12 
D) 3.34 
A) 50.05 
B) 8.85 
C) 4.12 
D) 3.34

Question 7

A bank officer wishes to study how many customers write bad checks.To accomplish this,the officer randomly selects a weekly sample of 100 checking accounts and records the number that wrote bad checks.The numbers of customers who wrote bad checks in 20 consecutive weekly samples of 100 account holders are,respectively,1,4,9,0,4,6,0,3,8,5,3,5,2,9,4,4,3,6,4,and 0.Find the LCL and UCL for the p chart.

Accepted Answer

A) [.0204,.0596] 
B) [.034,.046] 
C) [0,.0988] 
D) [0,.171] 
A) [.0204,.0596] 
B) [.034,.046] 
C) [0,.0988] 
D) [0,.171]

Question 8

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 ± .006 inches.Determine the upper specification limit and the lower specification limit for this process.

Accepted Answer

A) [1.982,2.018] 
B) [1.94,2.06] 
C) [1.994,2.006] 
D) [1.99,2.01] 
A) [1.982,2.018] 
B) [1.94,2.06] 
C) [1.994,2.006] 
D) [1.99,2.01]

Question 9

Use this information about 10 shipments of lightbulbs:   If 200 lightbulbs are selected at random from each of 10 shipments and the number of defectives in each shipment is given above,find the LCL and the UCL for the p chart.

Accepted Answer

A) [0,.1044] 
B) [.003,.017] 
C) [0,.0311] 
D) [.009,.0115] 
A) [0,.1044] 
B) [.003,.017] 
C) [0,.0311] 
D) [.009,.0115]

Question 10

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,to keep the coating as even as possible,thickness measurements are periodically taken at four different locations on the window.15 subgroups were observed,each consisting of four thickness measurements,with the following results: mean of the means =   = 50.05,and average range of 8.85.Is the process capable of meeting the specifications?

Accepted Answer

A) Yes 
B) No 
A) Yes 
B) No

Question 11

_________ is the set of international standards on quality management and quality assurance systems.It establishes processes for assuring that goods and services offered by the company meet a consistent level of quality acceptable to customers.

Accepted Answer

A) Control Charting 
B) SQC 
C) ISO 9000 
D) ASQC 
A) Control Charting 
B) SQC 
C) ISO 9000 
D) ASQC

Question 12

Which of the following control charts is designed to control the proportion of nonconforming units?

Accepted Answer

A) p chart 
B)    
C) R chart 
A) p chart 
B)    
C) R chart

Question 13

If   = 2.0144,   = .0972,and there are 25 subgroups of size 5,find the UCL and the LCL for the R chart.

Accepted Answer

A) [.045,.1498] 
B) [.0972,.2055] 
C) [0,.2055] 
D) [0.2,114] 
A) [.045,.1498] 
B) [.0972,.2055] 
C) [0,.2055] 
D) [0.2,114]

Question 14

A control chart on which the proportions of nonconforming units in subgroups of size n are plotted versus time is a(n)_____ chart.

Accepted Answer

A)    
B) R 
C) p 
D) C 
A)    
B) R 
C) p 
D) C

Question 15

If   = 16.1,   = .03,and n = 6,and if the specifications are [15.9,16.3],is the process capable?

Accepted Answer

A) Yes 
B) No 
A) Yes 
B) No

Question 16

Suppose that   and R charts based on subgroups of size 4 are being used to monitor the tire diameter of a new radial tire.The   andR charts are found to be in statistical control with   inches.A histogram of the tire diameter measurements indicates that these measurements are approximately normally distributed.If the tire diameter specifications are 50 inches ± 1 inch,is the process capable of meeting the specifications?

Accepted Answer

A) Yes 
B) No 
A) Yes 
B) No

Question 17

A range chart is a control chart on which ranges between individual process measurements within a subgroup are plotted.

Accepted Answer

A) True 
 B)False

Question 18

If   = 16.1,   = .03,and n = 6,calculate the natural tolerance limits.

Accepted Answer

A) [16.065,16.135] 
B) [16.088,16.112] 
C) [15.745,16.455] 
D) [16.055,16.145] 
A) [16.065,16.135] 
B) [16.088,16.112] 
C) [15.745,16.455] 
D) [16.055,16.145]

Question 19

When employing measurement data to study a process,the ____________ monitors the process mean.

Accepted Answer

A)    
B) p-bar chart 
C) R chart 
D) Natural tolerance 
E) Pattern analysis 
A)    
B) p-bar chart 
C) R chart 
D) Natural tolerance 
E) Pattern analysis

Question 20

A foreman wants to use an   chart to control the average length of the bolts manufactured.He has recently collected the six samples given below.   Calculate the mean of the means

Accepted Answer

A) 2.010 
B) 2.406 
C) 2.000 
D) 2.005 
A) 2.010 
B) 2.406 
C) 2.000 
D) 2.005

For a given control chart,zone boundaries consist of the UCL and LCL.

How well a product or a service performs in the marketplace is called the quality of ______________.

Control charts are used to reduce common causes of variation.

A systematic method for analyzing process data in which we monitor process variation is called ______________.

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 ± .006 inches.If the process mean is 2.001 and the process standard deviation is .0016,determine the estimated standard deviations of the leeway for this process.

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 ± .006 inches.Determine the upper specification limit and the lower specification limit for this process.

Use this information about 10 shipments of lightbulbs: If 200 lightbulbs are selected at random from each of 10 shipments and the number of defectives in each shipment is given above,find the LCL and the UCL for the p chart.

_________ is the set of international standards on quality management and quality assurance systems.It establishes processes for assuring that goods and services offered by the company meet a consistent level of quality acceptable to customers.

Which of the following control charts is designed to control the proportion of nonconforming units?

If = 2.0144, = .0972,and there are 25 subgroups of size 5,find the UCL and the LCL for the R chart.

A control chart on which the proportions of nonconforming units in subgroups of size n are plotted versus time is a(n)_____ chart.

If = 16.1, = .03,and n = 6,and if the specifications are [15.9,16.3],is the process capable?

A range chart is a control chart on which ranges between individual process measurements within a subgroup are plotted.

If = 16.1, = .03,and n = 6,calculate the natural tolerance limits.

When employing measurement data to study a process,the ____________ monitors the process mean.

A foreman wants to use an chart to control the average length of the bolts manufactured.He has recently collected the six samples given below. Calculate the mean of the means

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Descriptive Statistics: Numerical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Filters

Exam 15: Process Improvement Using Control Charts

For a given control chart,zone boundaries consist of the UCL and LCL.

How well a product or a service performs in the marketplace is called the quality of ______________.

Control charts are used to reduce common causes of variation.

A systematic method for analyzing process data in which we monitor process variation is called ______________.

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 ± .006 inches.If the process mean is 2.001 and the process standard deviation is .0016,determine the estimated standard deviations of the leeway for this process.

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 ± .006 inches.Determine the upper specification limit and the lower specification limit for this process.

Use this information about 10 shipments of lightbulbs: If 200 lightbulbs are selected at random from each of 10 shipments and the number of defectives in each shipment is given above,find the LCL and the UCL for the p chart.

_________ is the set of international standards on quality management and quality assurance systems.It establishes processes for assuring that goods and services offered by the company meet a consistent level of quality acceptable to customers.

Which of the following control charts is designed to control the proportion of nonconforming units?

If = 2.0144, = .0972,and there are 25 subgroups of size 5,find the UCL and the LCL for the R chart.

A control chart on which the proportions of nonconforming units in subgroups of size n are plotted versus time is a(n)_____ chart.

If = 16.1, = .03,and n = 6,and if the specifications are [15.9,16.3],is the process capable?

A range chart is a control chart on which ranges between individual process measurements within a subgroup are plotted.

If = 16.1, = .03,and n = 6,calculate the natural tolerance limits.

When employing measurement data to study a process,the ____________ monitors the process mean.

A foreman wants to use an chart to control the average length of the bolts manufactured.He has recently collected the six samples given below. Calculate the mean of the means

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Descriptive Statistics: Numerical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Filters