8 In a ready-mix plant, cylindrical samples are prepared and tested periodi- cally to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 27.6 MPa. The compressive strength data showm in Table P7.48 were col- lected. Use one system of units only as specified by the instructor. TABLE P7.48 Sample No. Compressive Strength, MPа Sample Compressive Strength, No. MPa 1 33.9 14 39.8 2 32.6 15 29.4 39.1 16 35.1 4 29.7 17 32.2 42.1 18 35.7 6 29.8 19 37.5 7 36.1 20 25.5 8 34.1 21 31.1 9. 36.1 22 25.4 10 28.9 23 28.3 11 39.8 24 25.4 12 31.2 25 27.0 13 28.0 a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
8 In a ready-mix plant, cylindrical samples are prepared and tested periodi- cally to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 27.6 MPa. The compressive strength data showm in Table P7.48 were col- lected. Use one system of units only as specified by the instructor. TABLE P7.48 Sample No. Compressive Strength, MPа Sample Compressive Strength, No. MPa 1 33.9 14 39.8 2 32.6 15 29.4 39.1 16 35.1 4 29.7 17 32.2 42.1 18 35.7 6 29.8 19 37.5 7 36.1 20 25.5 8 34.1 21 31.1 9. 36.1 22 25.4 10 28.9 23 28.3 11 39.8 24 25.4 12 31.2 25 27.0 13 28.0 a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:8 In a ready-mix plant, cylindrical samples are prepared and tested periodi-
cally to detect any mix problem and to ensure that the compressive strength is
higher than the lower specification limit. The minimum target value was set
at 27.6 MPa. The compressive strength data showm in Table P7.48 were col-
lected. Use one system of units only as specified by the instructor.
TABLE P7.48
Sample
No.
Compressive Strength,
MPа
Sample Compressive Strength,
No.
MPa
1
33.9
14
39.8
2
32.6
15
29.4
39.1
16
35.1
4
29.7
17
32.2
42.1
18
35.7
6
29.8
19
37.5
7
36.1
20
25.5
8
34.1
21
31.1
9.
36.1
22
25.4
10
28.9
23
28.3
11
39.8
24
25.4
12
31.2
25
27.0
13
28.0
a. Calculate the mean, standard deviation, and the coefficient of variation of
the data.
b. Using a spreadsheet program, create a control chart for these data showing
the target value and the lower specification limit. Is the plant production
meeting the specification requirement? If not, comment on possible
reasons. Comment on the data scatter.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 6 steps with 1 images
Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning