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Unformatted text preview: ity 11738 Chapter 01  An Introduction to Business Statistics 98. Suppose that
and R charts are based on subgroups of size four are being used to
monitor the tire diameter size of a new radial tire manufactured by a tire company. The
and R charts are found to be in statistical control with
inches. A histogram
of the tire diameter measurements indicates that distribution of these measurements is
approximately normally distributed.
Calculate the estimate of the percentage of tires that are out of specification.
A. 1.93%
B. 2.68%
C. 1.62%
D. 17.36%
.0268
LSL = 50  1 = 49
USL = 50 + 1 = 51 Estimated percentage of tires not meeting the specifications is 2.68%. AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 6
Topic: Process capability 11739 Chapter 01  An Introduction to Business Statistics 99. Suppose that and R charts are based on subgroups of size four are being used to monitor the tire diameter size of a new radial tire manufactured by a tire company. The
and R charts are found to be in statistical control with
inches. A histogram
of the tire diameter measurements indicates that distribution of these measurements is
approximately normally distributed.
Find the sigma level capability of the process.
A. 1.93
B. 3.22
C. 0.64
D. 0.22
1.93
LSL = 50  1 = 49
USL = 50 + 1 = 51 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 6
Topic: Process capability 11740 Chapter 01  An Introduction to Business Statistics 100. Among other quality measures, the quality of an electronic component used in
manufacturing stereo speakers is monitored with a pchart. In the last 25 days daily samples
60 units resulted in the following number of defective units per sample: 8, 4, 3, 7, 6, 2, 5, 3, 1,
0, 7, 4, 2, 0, 1, 6, 2, 4, 3, 1, 2, 8, 5, 6, 0. Determine the center line for this process.
A. .06
B. .03
C. .001
D. .056
.06 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: PChart Control Charts 11741 Chapter 01  An Introduction to Business Statistics 101. Among other quality measures, the quality of an electronic component used in
manufacturing stereo speakers is monitored with a control chart. In the last 25 days daily
samples 60 units resulted in the following number of defective units per sample: 8, 4, 3, 7, 6,
2, 5, 3, 1, 0, 7, 4, 2, 0, 1, 6, 2, 4, 3, 1, 2, 8, 5, 6, and 0. Determine the appropriate upper and
lower control limits for this process.
A. (.029 .091)
B. (.056 .064)
C. (0 .152)
D. (0 .202)
0 and 0.152 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: PChart Control Charts 11742 Chapter 01  An Introduction to Business Statistics 102. The quality of an electronic component used in manufacturing cell phones is monitored
with a pchart. 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
Find the appropriate center line.
A. .0473
B. .2667
C. .1067
D. .0133
.0473 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: PChart Control Charts 103. The quality of an electronic component used in manufacturing cell phones is monitored
with a pchart. 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
Find the LCL and UCL for the pchart
A. (0 .1208)
B. (.0228 .0718)
C. (0 .1897)
D. (.0445 .0501)
0 and .1208 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: PChart Control Charts 11743 Chapter 01  An Introduction to Business Statistics 104. The quality of an electronic component used in manufacturing cell phones is monitored
with a pchart. 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?
A. Yes
B. No
Yes, would be in control because is within the UCL AACSB: Analytic
Bloom's: Analysis
Difficulty: Medium
Learning Objective: 7
Topic: PChart Control Charts 105. Suppose that
and R charts are based on subgroups of size four are being used to
monitor the tire diameter size of a new radial tire manufactured by a tire company. The
and R charts are found to be in statistical control with
inches. A
histogram of the tire diameter measurements indicates that distribution of these measurements
is approximately normally distributed. Compute the natural tolerance limits for this process.
A. (48.68 52.32)
B. (49.89 51.11)
C. (48.86 52.14)
D. (46.75 54.25)
48.68 and 52.32 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 6
Topic: Process capability 11744 Chapter 01  An Introduction to Business Statistics 106. A motorcycle manufacturer produces the parts for its vehicles in different locations and
transports them...
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This document was uploaded on 01/20/2014.
 Winter '14

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