Run Size Failures (%) Run Size Failures (%) 1 1,000 3.5 11 6,500 1.5 2 4,100 3.8 12 1,000 5.5 2,000 5.5 13 7,000 1.0 6,000 1.9 14 3,000 4.5 6,800 2.0 15 2,200 4.2 6 3,000 3.2 16 1,800 6.0 7 2,000 3.8 17 5,400 2.0 8 1,200 4.2 18 5,800 2.0 5,000 3.8 19 1,000 6.2 10 3,800 3.0 20 1,500 7.0 3. 4)

ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
Publisher:NEWNAN
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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Question

Oregon Fiber Board makes roof liners for the automotive
industry. The manufacturing manager is concerned about
product quality. She suspects that one particular failure, tears in the fabric, is related to production-run size. An assistant
gathers the following data from production records:

a. Draw a scatter diagram for these data.
b. Does there appear to be a relationship between run size
and percent failures? What implications does this data
have for Oregon Fiber Board’s business?

Run
Size
Failures (%)
Run
Size
Failures (%)
1
1,000
3.5
11
6,500
1.5
2
4,100
3.8
12
1,000
5.5
2,000
5.5
13
7,000
1.0
6,000
1.9
14
3,000
4.5
6,800
2.0
15
2,200
4.2
6
3,000
3.2
16
1,800
6.0
7
2,000
3.8
17
5,400
2.0
8
1,200
4.2
18
5,800
2.0
5,000
3.8
19
1,000
6.2
10
3,800
3.0
20
1,500
7.0
3.
4)
Transcribed Image Text:Run Size Failures (%) Run Size Failures (%) 1 1,000 3.5 11 6,500 1.5 2 4,100 3.8 12 1,000 5.5 2,000 5.5 13 7,000 1.0 6,000 1.9 14 3,000 4.5 6,800 2.0 15 2,200 4.2 6 3,000 3.2 16 1,800 6.0 7 2,000 3.8 17 5,400 2.0 8 1,200 4.2 18 5,800 2.0 5,000 3.8 19 1,000 6.2 10 3,800 3.0 20 1,500 7.0 3. 4)
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