Run Chart.docx
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Ex no :20 PLOTTING RUN CHARTS Date Aim: To create the run chart for given data in Minitab.
Experiment Data: A quality engineer wants to evaluate how consistently a radon detection device measures the amount of radon. The engineer measures the radon level twice a day for 20 days. Construct a run chart to look for evidence of non-random patterns in the radon measurements from the membrane devices.
Day
Radon level
Day
Radon level
1
45
11
39
1
33
11
48
2
26
12
36
2
46
12
29
3
25
13
49
3
32
13
28
4
33
14
35
4
22
14
36
5
30
15
35
5
26
15
33
6
37
16
33
6
34
16
33
7
44
17
37
7
43
17
44
8
35
18
44
8
38
18
38
9
38
19
41
9
45
19
40
10
39
20
42
10
39
20
42
Procedure Step 1: Open the sample data, Go to file→ Open→ Sample Data→ RadonTime.MTW.
Step 2: Choose Stat > Quality Tools > Run Chart.
Step 3: In Single column, enter Radon Level.
Step 4: In Subgroup size, enter Day and click OK
Result:
The run chart for given data is obtained.
Experiment Data: A quality engineer wants to evaluate how consistently a radon detection device measures the amount of radon. The engineer measures the radon level twice a day for 20 days. Construct a run chart to look for evidence of non-random patterns in the radon measurements from the membrane devices.
Day
Radon level
Day
Radon level
1
45
11
39
1
33
11
48
2
26
12
36
2
46
12
29
3
25
13
49
3
32
13
28
4
33
14
35
4
22
14
36
5
30
15
35
5
26
15
33
6
37
16
33
6
34
16
33
7
44
17
37
7
43
17
44
8
35
18
44
8
38
18
38
9
38
19
41
9
45
19
40
10
39
20
42
10
39
20
42
Procedure Step 1: Open the sample data, Go to file→ Open→ Sample Data→ RadonTime.MTW.
Step 2: Choose Stat > Quality Tools > Run Chart.
Step 3: In Single column, enter Radon Level.
Step 4: In Subgroup size, enter Day and click OK
Result:
The run chart for given data is obtained.
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