Question
Professor Murphy wants to set up a control chart to monitor the percentage of absenteeism in...
Professor Murphy wants to set up a control chart to monitor the percentage of absenteeism in his introductory statistics course (50 students are registered). Absences per period for the last 15 class sessions are in the table below.
|
Session |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
|
|
Absent |
5 |
0 |
2 |
2 |
3 |
8 |
10 |
3 |
5 |
5 |
1 |
2 |
0 |
2 |
3 |
Using 3 sigma limits, calculate lower and upper control limits for a p-chart to track absences.
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
As a member of a management team, you are concerned with the absenteeism among assistants. The...
As a member of a management team, you are concerned with the
absenteeism among assistants. The issue has been raised by your
management team, who feel they often have to perform work normally
done by their assistants. To get the facts, absenteeism data were
gathered for the last three weeks, which is considered a
representative period for future conditions. After taking random
samples of 65 personnel files each day, the following data were
produced:
Day
Assistants Absent
Day
Assistants...
As a hospital administrator of a large hospital, you are concerned with the absenteeism among nurses'...
As a hospital administrator of a large hospital, you are
concerned with the absenteeism among nurses' aides. The issue has
been raised by registered nurses, who feel they often have to
perform work normally done by their aides. To get the facts,
absenteeism data were gathered for the last three weeks, which is
considered a representative period for future conditions. After
taking random samples of 60 personnel files each day, the
following data were produced:
Day
Aides Absent
Day...
HCH Manufacturing has decided to use a p-Chart with 2-sigma control limits to monitor the proportion...
HCH Manufacturing has decided to use a p-Chart with 2-sigma
control limits to monitor the proportion of defective steel bars
produced by their production process. The quality control manager
randomly samples 250 steel bars at 12 successively selected time
periods and counts the number of defective steel bars in the
sample.
Sample Defects
1 7
2 10
3 14
4 8
5 9
6 11
7 9
8 9
9 14
10 11
11 7
12 8
Step 1 of...
calculate the upper and lower control limits and then construct a control chart. Display your chart....
calculate the upper and lower control limits and then construct
a control chart. Display your chart. Question:
Using the control chart rules for detecting special causes, can you
detect a special cause? Explain why or why not.
Week
Average Delay Time (in
days)
1
34
2
30
3
35
4
32
5
28
6
26
7
29
8
28
9
35
10
26
11
34
12
31
13
28
14
40
15
26
16
32
17
31
18
30
19...
Inter State Moving and Storage Company is setting up a control chart to monitor the proportion...
Inter State Moving and Storage Company is setting up a control
chart to monitor the proportion of residential moves that result in
written complaints due to late delivery, lost items, or damaged
items. A sample of 40 moves is selected for each of the last 12
months. The number of written complaints in each sample is 7, 9, 4,
9, 2, 6, 11, 8, 5, 5, 6, and 15. Click here for the Excel Data File
Insert the mean proportion...
1 An x̅ chart with a sample size of 4 is used to control the mean...
1
An x̅ chart with a sample size of 4 is used to control the mean
of a normally distributed quality characteristic. It is known that
process standard deviation is 8. The upper and lower control limits
of the chart are 147 and 123 respectively. Assume the process mean
shifts to 121.
What is the probability that this shift is detected on the first
subsequent sample?
What is expected number of samples taken before the shift is
detected?
2
The...
Using samples of 200 credit card statements, an Auditor found the following: ---Sample Number: 1 2 ...
Using samples of 200 credit card statements, an Auditor found
the following:
---Sample Number: 1 2
3 4
5 6 7 8
9 10 11
12 13 14 15
Number of Errors: 17 12
11 12 10 10
17 15
12 13
15 10
7 8 10
Determine lower and upper control limits for the fraction of
errors using three-sigma limits.
Question 8 options:
0 , .126
.017 , .101
.026 , .093
.009 , .109
None of the Above
The Quality Control...
The following are quality control data for a manufacturing process at Kensport Chemical Company. The data...
The following are quality control data for a manufacturing
process at Kensport Chemical Company. The data show the temperature
in degrees centigrade at five points in time during a manufacturing
cycle.
Sample
x
R
1
95.72
1.0
2
95.24
0.9
3
95.18
0.7
4
95.42
0.4
5
95.46
0.5
6
95.32
1.1
7
95.40
0.9
8
95.44
0.3
9
95.08
0.2
10
95.50
0.6
11
95.80
0.6
12
95.22
0.2
13
95.58
1.3
14
95.22
0.6
15
95.04
0.8
16...
A taxi company wants to do an annual review of its service by checking the number...
A taxi company wants to do an annual review of its service by
checking the number of monthly complaints. The total number of
complaints in each of the last 12 months were 15, 9, 13, 12, 9, 20,
8, 10, 16, 11, 18, and 3.
If 3-sigma limits are used to construct a control chart
(corresponding to 99.73 percent) calculate the upper control limit
(UCL) and the lower control limit (LCL) of this control chart.
b. Examining the data...
The following are quality control data for a manufacturing process at Kensport Chemical Company. The data...
The following are quality control data for a manufacturing
process at Kensport Chemical Company. The data show the temperature
in degrees centigrade at five points in time during a manufacturing
cycle.
Sample
x
R
1
95.72
1.0
2
95.24
0.9
3
95.18
0.7
4
95.42
0.4
5
95.46
0.5
6
95.32
1.1
7
95.40
0.9
8
95.44
0.3
9
95.08
0.2
10
95.50
0.6
11
95.80
0.6
12
95.22
0.2
13
95.60
1.3
14
95.22
0.6
15
95.04
0.8
16...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 13 minutes ago
asked 15 minutes ago
asked 26 minutes ago
asked 39 minutes ago
asked 47 minutes ago
asked 51 minutes ago
asked 56 minutes ago
asked 56 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago