Question 1

The number of estimated process standard deviations between   and the closest specification limit is the ______ of the process.

Accepted Answer

A) sigma level capability 
B) leeway 
C) Cpk Index 
D) capability 
A) sigma level capability 
B) leeway 
C) Cpk Index 
D) capability A

Question 2

The quality of an electronic component used in manufacturing cell phones is monitored with a p-chart.In the last 20 days daily samples of 75 units resulted in the following number of defective units per sample: 8,4,3,7,3,1,0,7,4,2,0,1,6,2,4,3,1,2,8,5
If on the 21st day,9 defective units were found in the sample of 75 units,would the process be in control?

Accepted Answer

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

Question 3

Rational subgrouping allows us to detect changes _____ subgroups.

Accepted Answer

A) Within 
B) Between 
C) In the sizes of 
D) None of the above 
A) Within 
B) Between 
C) In the sizes of 
D) None of the above B

Question 4

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

Accepted Answer

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

Question 5

How well the design of the product meets and exceeds the needs and expectations of the customers is called the quality of performance.

Accepted Answer

A) True 
 B)False

Question 6

_____ is the sigma level capability divided by three.

Accepted Answer

A) Process leeway 
B) Cpk index 
C) R/d2 
D) p 
A) Process leeway 
B) Cpk index 
C) R/d2 
D) p

Question 7

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 and each subgroup consists of the four thickness measurements taken across the windows at a particular time with the following results: mean of the means =   = 50.05 and the average range of 8.85. Assuming that the process is in statistical control,calculate the natural tolerance limits for the process.

Accepted Answer

A) (45.75 54.35) 
B) (37.16 62.94) 
C) (42.40 57.70) 
D) (47.50 52.60) 
A) (45.75 54.35) 
B) (37.16 62.94) 
C) (42.40 57.70) 
D) (47.50 52.60)

Question 8

If   = 2.0144,   = .0972,and 25 subgroups of size 5. Find the UCL and the LCL for the   chart.

Accepted Answer

A) (1.999 2.029) 
B) (1.958 2.071) 
C) (1.917 2.112) 
D) (1.437 2.591) 
A) (1.999 2.029) 
B) (1.958 2.071) 
C) (1.917 2.112) 
D) (1.437 2.591)

Question 9

Common causes of process variation:

Accepted Answer

A) Are sources of unusual process variation 
B) Usually must be remedied by management 
C) Usually must be remedied by local supervision 
D) Always exist together with assignable causes of variation 
E) Can never be remedied or reduced 
A) Are sources of unusual process variation 
B) Usually must be remedied by management 
C) Usually must be remedied by local supervision 
D) Always exist together with assignable causes of variation 
E) Can never be remedied or reduced

Question 10

If a process is only influenced by common causes of variation,we can state that the process is in statistical control.

Accepted Answer

A) True 
 B)False

Question 11

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 and each subgroup consists of the four thickness measurements taken across the windows at a particular time with the following results: mean of the means =   = 50.05 and the average range of 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 12

A fastener company produces bolts with a nominal (target)length of 2.00 inches.The specifications are 2.00 $\pm$ .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 13

How well the design of a product or service meets and exceeds the needs and expectations of the customer is called

Accepted Answer

A) Process capability 
B) Quality of conformance 
C) Quality of performance 
D) Quality of design 
E) Process control 
A) Process capability 
B) Quality of conformance 
C) Quality of performance 
D) Quality of design 
E) Process control

Question 14

If   = 5.2,   = .3,and n = 4,calculate natural tolerance limits.

Accepted Answer

A) (5.054 5.346) 
B) (4.3 6.1) 
C) (4.806 5.594) 
D) (4.763 5.637) 
A) (5.054 5.346) 
B) (4.3 6.1) 
C) (4.806 5.594) 
D) (4.763 5.637)

Question 15

A bank officer wishes to study how many customers write bad checks.To accomplish this,the officer randomly selects a weekly sample of 100 of checking accounts,and the number of who wrote bad checks was recorded.The numbers of customers who wrote bad checks in 20 consecutive weekly samples of 100 cardholders are,respectively, 1,4,9,0,4,6,0,3,8,5,3,5,2,9,4,4,3,6,4,0
Find the appropriate center line.

Accepted Answer

A) .08 
B) .01 
C) .09 
D) .04 
A) .08 
B) .01 
C) .09 
D) .04

Question 16

If 20 samples of size 7 are drawn with   = 33.33 and   = 5.65, What is the A-B upper boundary for the   chart?

Accepted Answer

A) 35.697 
B) 34.908 
C) 34.347 
D) 34.008 
A) 35.697 
B) 34.908 
C) 34.347 
D) 34.008

Question 17

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. Assuming that the process is in statistical control,calculate the natural tolerance limits for the process.

Accepted Answer

A) (1.47 7.53) 
B) (3.197 5.803) 
C) (3.729 5.271) 
D) (4.066 4.934) 
A) (1.47 7.53) 
B) (3.197 5.803) 
C) (3.729 5.271) 
D) (4.066 4.934)

Question 18

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 19

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   chart.

Accepted Answer

A) (1.975 2.035) 
B) (1.915 2.095) 
C) (1.983 2.027) 
D) (1.991 2.019) 
A) (1.975 2.035) 
B) (1.915 2.095) 
C) (1.983 2.027) 
D) (1.991 2.019)

Question 20

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

Accepted Answer

A) p-charts 
B)    
C) R-chart 
A) p-charts 
B)    
C) R-chart

The number of estimated process standard deviations between and the closest specification limit is the ______ of the process.

Rational subgrouping allows us to detect changes _____ subgroups.

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

How well the design of the product meets and exceeds the needs and expectations of the customers is called the quality of performance.

_____ is the sigma level capability divided by three.

If = 2.0144, = .0972,and 25 subgroups of size 5. Find the UCL and the LCL for the chart.

Common causes of process variation:

If a process is only influenced by common causes of variation,we can state that the process is in statistical control.

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

How well the design of a product or service meets and exceeds the needs and expectations of the customer is called

If = 5.2, = .3,and n = 4,calculate natural tolerance limits.

If 20 samples of size 7 are drawn with = 33.33 and = 5.65, What is the A-B upper boundary for the chart?

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

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 chart.

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

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

The number of estimated process standard deviations between and the closest specification limit is the ______ of the process.

Rational subgrouping allows us to detect changes _____ subgroups.

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

How well the design of the product meets and exceeds the needs and expectations of the customers is called the quality of performance.

_____ is the sigma level capability divided by three.

If = 2.0144, = .0972,and 25 subgroups of size 5. Find the UCL and the LCL for the chart.

Common causes of process variation:

If a process is only influenced by common causes of variation,we can state that the process is in statistical control.

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

How well the design of a product or service meets and exceeds the needs and expectations of the customer is called

If = 5.2, = .3,and n = 4,calculate natural tolerance limits.

If 20 samples of size 7 are drawn with = 33.33 and = 5.65, What is the A-B upper boundary for the chart?

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

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 chart.

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

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. Determine the upper specification limit and the lower specification limit for this process.