Question 1

A sequence of steadily decreasing points on a control chart is called run down.

Accepted Answer

A) True 
 B)False

Question 2

Sigma level capability is the number of estimated process standard deviations between the estimated process mean and the specification limit closest to the estimated process mean.

Accepted Answer

A) True 
 B)False

Question 3

A motorcycle manufacturer produces the parts for its vehicles in different locations and transports them to it plant for assembly.In order to keep the assembly operations running efficiently,it is vital that all parts be within specification limits.One important part used in the assembly is the engine camshaft and one important quality characteristic is the case hardness depth.Specifications state that the hardness depth must be between 3.0 mm and 6.0 mm.To investigate the process,the quality control engineer selected 25 daily subgroups of n = 5 and measured the hardness depth.The process yielded a mean of the means   = 4.50 and an average range = 1.01. Calculate the center line for the R chart.

Accepted Answer

A) 1.01 
B) 0.22 
C) 4.50 
D) 0.90 
A) 1.01 
B) 0.22 
C) 4.50 
D) 0.90

Question 4

Unusual sources of variation that can be attributed to specific causes are called the common causes of process variation.

Accepted Answer

A) True 
 B)False

Question 5

Use this information about 10 shipments of light bulbs:   If 200 light bulbs 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 6

If   = 16.1,   = .03,and n = 6,calculate 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 7

Assume that 25 samples of 50 each are taken and the total number of defectives is 34. Find the LCL and UCL for the p-chart.

Accepted Answer

A) (.0134 .0410) 
B) (0 .0962) 
C) (.0042 .0502) 
D) (.0239 .0304) 
A) (.0134 .0410) 
B) (0 .0962) 
C) (.0042 .0502) 
D) (.0239 .0304)

Question 8

If 20 samples of size 7 are drawn with   = 33.33 and   = 5.65. What are the UCL and the LCL for the   chart?

Accepted Answer

A) (32.313 34.347) 
B) (30.693 35.697) 
C) (27.68 38,98) 
D) (32.911 33.749) 
A) (32.313 34.347) 
B) (30.693 35.697) 
C) (27.68 38,98) 
D) (32.911 33.749)

Question 9

The distance between natural tolerance limits and customer specifications is called _____.

Accepted Answer

A) process leeway 
B) sigma level 
C) Cpk Index 
D) zone 
A) process leeway 
B) sigma level 
C) Cpk Index 
D) zone

Question 10

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

Accepted Answer

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

Question 11

If a manufacturing process is in statistical control,it means that the process is capable of producing products that meets the customer's needs.

Accepted Answer

A) True 
 B)False

Question 12

A motorcycle manufacturer produces the parts for its vehicles in different locations and transports them to it plant for assembly.In order to keep the assembly operations running efficiently,it is vital that all parts be within specification limits.One important part used in the assembly is the engine camshaft and one important quality characteristic is the case hardness depth.Specifications state that the hardness depth must be between 3.0 mm and 6.0 mm.To investigate the process,the quality control engineer selected 25 daily subgroups of n = 5 and measured the hardness depth.The process yielded a mean of the means   = 4.50 and an average range = 1.01. Is the process capable of meeting the specifications?

Accepted Answer

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

Question 13

A unit that fails to meet specifications is called a _____ unit.

Accepted Answer

A) conforming 
B) capable 
C) defective 
D) common cause 
A) conforming 
B) capable 
C) defective 
D) common cause

Question 14

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 $\pm$ .006 inches. If the process mean is 2.001 and the process standard deviation is .0016,determine the value of Cpk.

Accepted Answer

A) 1.042 
B) 1.25 
C) 2.001 
D) 1.458 
A) 1.042 
B) 1.25 
C) 2.001 
D) 1.458

Question 15

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 16

If 20 samples of size 7 are drawn with   = 33.33 and   = 5.65, What are the UCL and LCL for the R-chart?

Accepted Answer

A) (2.345 8.955) 
B) (.076 1.924) 
C) (.415 1.585) 
D) (.429 10.871) 
A) (2.345 8.955) 
B) (.076 1.924) 
C) (.415 1.585) 
D) (.429 10.871)

Question 17

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.   Determine the LCL and the UCL for the R chart.

Accepted Answer

A) (0 .0685) 
B) (0 .076) 
C) (0 .03) 
D) (0 .0601) 
A) (0 .0685) 
B) (0 .076) 
C) (0 .03) 
D) (0 .0601)

Question 18

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

Accepted Answer

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

Question 19

For a manufacturing process,   = 10 inches,   = .4 inches and the subgroup sample size is 6 units. Calculate the standard control limits for the R chart.

Accepted Answer

A) 0 and .846 
B) 0 and .802 
C) 0 and .77 
D) 0 and 1.0 
E) -.09 and .89 
A) 0 and .846 
B) 0 and .802 
C) 0 and .77 
D) 0 and 1.0 
E) -.09 and .89

Question 20

How well a process is able to meet the requirements set forth by the process design is called

Accepted Answer

A) Process leeway 
B) Quality of conformance 
C) Quality of performance 
D) Quality of design 
A) Process leeway 
B) Quality of conformance 
C) Quality of performance 
D) Quality of design

A sequence of steadily decreasing points on a control chart is called run down.

Sigma level capability is the number of estimated process standard deviations between the estimated process mean and the specification limit closest to the estimated process mean.

Unusual sources of variation that can be attributed to specific causes are called the common causes of process variation.

Use this information about 10 shipments of light bulbs: If 200 light bulbs 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.

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

Assume that 25 samples of 50 each are taken and the total number of defectives is 34. Find the LCL and UCL for the p-chart.

If 20 samples of size 7 are drawn with = 33.33 and = 5.65. What are the UCL and the LCL for the chart?

The distance between natural tolerance limits and customer specifications is called _____.

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

If a manufacturing process is in statistical control,it means that the process is capable of producing products that meets the customer's needs.

A unit that fails to meet specifications is called a _____ unit.

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 $\pm$ .006 inches. If the process mean is 2.001 and the process standard deviation is .0016,determine the value of Cpk.

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

If 20 samples of size 7 are drawn with = 33.33 and = 5.65, What are the UCL and LCL for the R-chart?

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. Determine the LCL and the UCL for the R chart.

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

For a manufacturing process, = 10 inches, = .4 inches and the subgroup sample size is 6 units. Calculate the standard control limits for the R chart.

How well a process is able to meet the requirements set forth by the process design is called

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

Model Building and Model Diagnostics

Time Series Forecasting

Nonparametric Methods

Decision Theory

Filters

Exam 17: Process Improvement Using Control Charts

A sequence of steadily decreasing points on a control chart is called run down.

Sigma level capability is the number of estimated process standard deviations between the estimated process mean and the specification limit closest to the estimated process mean.

Unusual sources of variation that can be attributed to specific causes are called the common causes of process variation.

Use this information about 10 shipments of light bulbs: If 200 light bulbs 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.

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

Assume that 25 samples of 50 each are taken and the total number of defectives is 34. Find the LCL and UCL for the p-chart.

If 20 samples of size 7 are drawn with = 33.33 and = 5.65. What are the UCL and the LCL for the chart?

The distance between natural tolerance limits and customer specifications is called _____.

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

If a manufacturing process is in statistical control,it means that the process is capable of producing products that meets the customer's needs.

A unit that fails to meet specifications is called a _____ unit.

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 ±\pm± .006 inches. If the process mean is 2.001 and the process standard deviation is .0016,determine the value of Cpk.

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

If 20 samples of size 7 are drawn with = 33.33 and = 5.65, What are the UCL and LCL for the R-chart?

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. Determine the LCL and the UCL for the R chart.

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

For a manufacturing process, = 10 inches, = .4 inches and the subgroup sample size is 6 units. Calculate the standard control limits for the R chart.

How well a process is able to meet the requirements set forth by the process design is called

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

Model Building and Model Diagnostics

Time Series Forecasting

Nonparametric Methods

Decision Theory

Filters

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 $\pm$ .006 inches. If the process mean is 2.001 and the process standard deviation is .0016,determine the value of Cpk.