Start time # of
defects start
time # of
defects start
time #
of defect
|
8:00 |
1 |
10:45 |
0 |
2:15 |
0 |
|
8:15 |
0 |
11:00 |
0 |
2:30 |
2 |
|
8:30 |
0 |
11:15 |
0 |
2:45 |
2 |
|
8:45 |
1 |
11:30 |
1 |
3:00 |
3 |
|
9:00 |
0 |
11:45 |
3 |
3:30 |
0 |
|
9:15 |
1 |
1:00 |
1 |
3:45 |
1 |
|
9:30 |
1 |
1:15 |
0 |
4:00 |
0 |
|
9:45 |
2 |
1:30 |
0 |
4:15 |
0 |
|
10:00 |
3 |
1:45 |
1 |
4:30 |
1 |
|
10:30 |
1 |
2:00 |
1 |
4:45 |
3 |
Prepare a run chart for the occurrences of defective computer
monitors based on the following data, which an analyst obtained
from the process for making the monitors. Workers are give a
15-minute break at 10:15am and 3:15pm, and a lunch break at noon.
What can you conclude ?
Pg 448 #2
2. An automatic filling machine is sued to fill 1-liter bottles
of cola. The machine output is approximately normal with a mean of
1.0 liter and a standard deviation of .01 liter. Output is
monitored using means of samples of 25 observations.
Determine upper and lower control limits that will include
roughly 97 percent of the sample means when the process is in
control.
B. Given these sample means: 1.005, 1.001, .998, 1.002, .995,
and .999 is the process in control?
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