Statistics for Engineers and Scientists
4th Edition
ISBN: 9780073401331
Author: William Navidi Prof.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 10.3, Problem 8E
Each hour, a 10 m2 section of fabric is inspected for flaws. The numbers of flaws observed for the last 20 hours are as follows:
| 38 | 35 | 35 | 49 | 33 | 48 | 40 | 47 | 45 | 46 |
| 41 | 53 | 36 | 41 | 51 | 63 | 35 | 58 | 55 | 57 |
- a. Compute the upper and lower 3σ limits for a c chart.
- b. Is the process in control? If not, when is it first detected to be out of control?
Expert Solution & Answer
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Students have asked these similar questions
The data in the table below consist of measurements y₁, y2, y3, and yn of the ramus bone at four
different ages on each of 20 boys.
1. Find y.
2. Find Sn
3. Find R
Ramus Bone Length at Four Different Ages for 20 Boys.
Age
Individual
1
23
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
8 yr (yi)
47.8
46.4
46.3
45.1
47.6
52.5
51.2
49.8
48.1
45
51.2
48.5
52.1
48.2
49.6
50.7
47.2
53.3
46.2
46.3
8½ yr
(Y2)
48.8
47.3
46.8
45.3
48.5
53.2
53
50
50.8
47
51.4
49.2
52.8
48.9
50.4
51.7
47.7
54.6
47.5
47.6
9 yr
(Y3)
49
47.7
47.8
46.1
48.9
53.3
54.3
50.3
52.3
47.3
51.6
53
53.7
49.3
51.2
52.7
48.4
55.1
48.1
51.3
9½ yr
(Y4)
49.7
48.4
48.5
47,2
49.3
53.7
54.5
52.7
54.4
48.3
51.9
55.5
55
49.8
51.8
53.3
49.5
55.3
48.4
51.8
ve 7:16. Calculate Bowley's coefficient of skewness from the following data:
75
100
125
150
175
200
225
250
Mid-value
35
40
48
100
125
80
50
22
Frequency
2. Use any social media application and select any 6 students and ask them how many hours
they spend in social media each day
a. Fill the following table and provide evident that you ask 6 students.
I
Student #
1
2
3
4
Hours
12
7
8
4
11
b. Calculate all central tendency measurements of the time.
c. Calculate all dispersion measurements of the time.
Chapter 10 Solutions
Statistics for Engineers and Scientists
Ch. 10.1 - Indicate whether each of the following quality...Ch. 10.1 - True or false: a. Control charts are used to...Ch. 10.1 - Prob. 3ECh. 10.1 - Prob. 4ECh. 10.1 - True or false: a. When a process is in a stale of...Ch. 10.1 - Prob. 6ECh. 10.2 - The quality-control plan for a certain production...Ch. 10.2 - The following X chart depicts the last 50 samples...Ch. 10.2 - The thickness, in mm, of metal washers is measured...Ch. 10.2 - Repeat Exercise 3, using the S chart in place of...
Ch. 10.2 - A process has mean 12 and standard deviation 3....Ch. 10.2 - A process has mean 8 and standard deviation 2. The...Ch. 10.2 - A process is monitored by taking samples at...Ch. 10.2 - Prob. 8ECh. 10.2 - Repeat Exercise 8, using the S chart in place of...Ch. 10.2 - Prob. 10ECh. 10.2 - Repeat Exercise 10, using the S chart in place of...Ch. 10.2 - Copper wires are coated with a thin plastic...Ch. 10.2 - Repeat Exercise 12, using the S chart in place of...Ch. 10.3 - Prob. 1ECh. 10.3 - The target fill weight for a box of cereal is 350...Ch. 10.3 - Prob. 3ECh. 10.3 - Refer to Exercise 3. In the last 50 samples, there...Ch. 10.3 - A newly designed quality-control program for a...Ch. 10.3 - Prob. 6ECh. 10.3 - Prob. 7ECh. 10.3 - Each hour, a 10 m2 section of fabric is inspected...Ch. 10.4 - Refer to Exercise 3 in Section 10.2. a. Delete any...Ch. 10.4 - Refer to Exercise 8 in Section 10.2. a. Delete any...Ch. 10.4 - Prob. 3ECh. 10.4 - Refer to Exercise 12 in Section 10.2.ss a. Delete...Ch. 10.4 - Prob. 5ECh. 10.4 - Prob. 6ECh. 10.5 - The thickness specification for aluminum sheets is...Ch. 10.5 - The specification for the diameters of ball...Ch. 10.5 - Refer to Exercise 2. a. To what value should the...Ch. 10.5 - Refer to Exercise 1. a. To what value should the...Ch. 10.5 - A process has a process capability index of Cp =...Ch. 10 - Prob. 1SECh. 10 - Prob. 2SECh. 10 - Prob. 3SECh. 10 - Prob. 4SECh. 10 - Prob. 5SECh. 10 - Prob. 6SECh. 10 - To set up a p chart to monitor a process that...
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