Question 1

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$
-Referring to Table 17-8, an $\bar { X }$ chart is to be used for the time required to register. The lower control limit for this data set is ________, while the upper control limit is ________.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 2

The smaller the capability index, the more capable a process is of meeting customer requirements.

Accepted Answer

The smaller the capability index, the less capable a process is of meeting customer requirements. A larger capability index indicates a process that is more capable.

Question 3

Maintaining the gains that have been made with a revised process in the long term by avoiding potential problems that can occur when a process is changed involves which part of the DMAIC process?
A) Define
B) Measure
C) Analyze
D) Improve
E) Control

Accepted Answer

The Control phase of the DMAIC process is focused on ensuring that improvements made during the Improve phase are sustained in the long term. This involves the implementation of control plans and regular monitoring to prevent potential problems that can occur when a process is changed. Therefore, the best choice is E.

Question 4

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$

-Referring to Table 17-8, based on the R chart, it appears that the process is out of control.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 5

A process capability is estimated by the percentage of product or service that fall outside the specification limits.

Accepted Answer

The answer of A process capability is estimated by the...

Question 6

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$

-Referring to Table 17-8, an R chart is to be constructed for the time required to register. The lower control limit for this data set is ________.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 7

Which of the following best measures the ability of a process to consistently meet specified customer-driven requirement?
A) Process capability.
B) Specification limits
C) Upper control limit
D) Lower control limit

Accepted Answer

Process capability measures the ability of a process to consistently meet customer-driven requirements by comparing the process's performance with its specification limits. The specification limits (option B) are the acceptable ranges for the process output determined by the customer or industry standards. The upper control limit and lower control limit (options C and D) are statistical measures used in process control to monitor and control the process performance but are not direct measures of the process's ability to meet customer requirements.

Question 8

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$
-Referring to Table 17-8, construct an $\bar { X }$ chart for the time required to register.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 9

Which of the following is a method for breaking process into a series of steps in order to eliminate defects and produce near perfect results?
A) Deming's 14 points management
B) Six Sigma management
C) Shewhart-Deming cycle
D) $\bar { X }$ R chart and chart

Accepted Answer

The method for breaking process into a series of steps in order to eliminate defects and produce near perfect results is known as Six Sigma management. It uses a data-driven approach to identify and eliminate the sources of variation in a process, and involves breaking the process down into smaller steps or stages, measuring and analyzing each one, and then making improvements to each stage to eliminate defects and improve overall quality. Deming's 14 points management, Shewhart-Deming cycle, and X-Bar R chart are all quality management tools and methods, but they do not specifically focus on breaking down processes into steps to eliminate defects.

Question 10

Which of the following is not part of the DMAIC process in Six Sigma management?
A) Define
B) Do
C) Analyze
D) Control

Accepted Answer

The DMAIC process in Six Sigma management includes Define, Measure, Analyze, Improve, and Control. "Do" is not a part of the DMAIC process.

Question 11

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$

-Referring to Table 17-8, construct an R chart for the time required to register.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 12

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$

-Referring to Table 17-8, an R chart is to be constructed for the time required to register. One way to create the upper control limit involves multiplying the mean of the sample ranges by D₄. For this data set, the value of D₄ is ________.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 13

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$

-Referring to Table 17-8, an R chart is to be constructed for the time required to register. One way to create the lower control limit involves multiplying the mean of the sample ranges by D₃. For this data set, the value of D₃ is ________.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 14

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$

-Referring to Table 17-8, an R chart is to be constructed for the time required to register. The upper control limit for this data set is ________.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 15

Determining the root causes of why defects can occur along with the variables in the process that cause these defects to occur involves which part of the DMAIC process?
A) Define
B) Measure
C) Analyze
D) Improve
E) Control

Accepted Answer

Determining the root causes of defects and identifying the process variables that contribute to these defects falls under the Analyze phase of the DMAIC process.

Question 16

Developing operational definitions for each critical-to-quality characteristic involves which part of the DMAIC process?
A) Define
B) Measure
C) Analyze
D) Improve
E) Control

Accepted Answer

Developing operational definitions for each critical-to-quality characteristic is part of the Measure phase of the DMAIC process. In this phase, data is collected and analyzed to establish a baseline performance metric and identify the root causes of defects or variation in the process. Developing clear and comprehensive operational definitions is essential for ensuring consistent and reliable data collection, which is necessary for accurate measurement and analysis.

Question 17

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$
-Referring to Table 17-8, based on the $\bar { X }$ chart, it appears that the process is in control.

Accepted Answer

The process is not in control because there is significant variability in the means across different days, indicating inconsistency in the registration times.

Question 18

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$
-Referring to Table 17-8, an $\bar { X }$ chart is to be used for the time required to register. One way to obtain the control limits is to take the grand mean and add and subtract the product of A₂ times the mean of the sample ranges. For this data set, the value of A₂ is ________.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 19

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. 
$\begin{array}{rrrr}
 \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\
 1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$
-Referring to Table 17-8, an $\bar { X }$ chart is to be used for the time required to register. The center line of this chart is located at ________.

Accepted Answer

The answer of TABLE 17-8
Recently, a university switched to a...

Question 20

An in-control process must be achieved before being able to estimate process capability.

Accepted Answer

Before being able to estimate process capability, the process must be stable and in-control. This means that the process variation is consistent and predictable, and there are no special or assignable causes of variation present. Only then can the process performance be accurately measured and assessed for capability.

Quiz 17: Statistical Applications in Quality Management

The smaller the capability index, the more capable a process is of meeting customer requirements.

Maintaining the gains that have been made with a revised process in the long term by avoiding potential problems that can occur when a process is changed involves which part of the DMAIC process?

A process capability is estimated by the percentage of product or service that fall outside the specification limits.

Which of the following best measures the ability of a process to consistently meet specified customer-driven requirement?

Which of the following is a method for breaking process into a series of steps in order to eliminate defects and produce near perfect results?

Which of the following is not part of the DMAIC process in Six Sigma management?

Determining the root causes of why defects can occur along with the variables in the process that cause these defects to occur involves which part of the DMAIC process?

Developing operational definitions for each critical-to-quality characteristic involves which part of the DMAIC process?

An in-control process must be achieved before being able to estimate process capability.