A high-level voltage power supply should have a nominal output
voltage of 350 V. A sample...
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A high-level voltage power supply should have a nominal outputvoltage of 350 V. A sample of four units is selected each day andtested for process-control purposes. The data (20 days, 1sample/day) shown in the table below give the difference betweenthe observed reading on each unit and the nominal voltage timesten; that is, xi = (observed voltage on unit350)*10.
Voltage Data
Voltage Data
Sample #
xi
Sample #
xi
1
6
11
8
1
9
11
12
1
10
11
14
1
15
11
16
2
10
12
6
2
4
12
13
2
6
12
9
2
11
12
11
3
7
13
16
3
8
13
9
3
10
13
13
3
5
13
15
4
8
14
7
4
9
14
13
4
6
14
10
4
13
14
12
5
9
15
11
5
10
15
7
5
7
15
10
5
13
15
16
6
12
16
15
6
11
16
10
6
10
16
11
6
10
16
14
7
16
17
9
7
10
17
8
7
8
17
12
7
9
17
10
8
7
18
15
8
5
18
7
8
10
18
10
8
4
18
11
9
9
19
8
9
7
19
6
9
8
19
9
9
12
19
12
10
15
20
13
10
16
20
14
10
10
20
11
10
13
20
15
Calculate the UCL and LCL for the x̄-chart.
Calculate the UCL and LCL for the R-chart.
Set up x̄ and R charts on this process. Is the processin statistical control?
If specifications are at 350 V ± 5 V, what can you say aboutprocess capability? Calculate Cp. Interpret thecalculated value of Cp.
Calculate Cpk. Interpret the calculated value ofCpk.
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