Homework Answers
(a)
| Sample No. | x1 | x2 | x3 | x4 | Mean | Range |
| 1 | 972 | 990 | 997 | 1000 | 989.75 | 28 |
| 2 | 994 | 1005 | 996 | 994 | 997.25 | 11 |
| 3 | 1029 | 1022 | 1028 | 972 | 1012.75 | 57 |
| 4 | 994 | 1025 | 999 | 994 | 1003.00 | 31 |
| 5 | 1004 | 993 | 1009 | 1016 | 1005.50 | 23 |
| 6 | 986 | 973 | 1003 | 987 | 987.25 | 30 |
| 7 | 982 | 977 | 988 | 998 | 986.25 | 21 |
| 8 | 985 | 982 | 1021 | 1013 | 1000.25 | 39 |
| 9 | 1027 | 1010 | 1003 | 989 | 1007.25 | 38 |
| 10 | 1028 | 997 | 1002 | 978 | 1001.25 | 50 |
| 11 | 1013 | 1029 | 1011 | 999 | 1013.00 | 30 |
| 12 | 975 | 1029 | 1026 | 979 | 1002.25 | 54 |
| 13 | 985 | 1003 | 987 | 980 | 988.75 | 23 |
| 14 | 1022 | 986 | 1028 | 983 | 1004.75 | 45 |
| 15 | 998 | 1023 | 1027 | 1021 | 1017.25 | 29 |
(b)
| X_double-bar | 1001.100 |
| R-bar | 33.933 |
(c)
| UCL_X | 1025.871 |
| LCL_X | 976.329 |
(d)
| UCL_R | 77.368 |
| LCL_R | 0 |
(e)
The process is in statistical control for al the sample Mean and Ranges are within their respective [LCL, UCL] ranges.
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Problem 10-25 Resistors for electronic circuits are manufactured on a high-speed automated machine. The machine is...
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Resistors for electronic circuits are manufactured on a
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To set up the machine and to create a control chart to be used
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Resistors for electronic circuits are manufactured on a high-speed automated machine. The machine is set up...
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A) Resistors for electronic circuits are being manufactured on a high-speed automated machine. Th...
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high-speed automated machine. The machine is set up to produce a
large run of resistors of 1,000 ohms each. To create a control
chart to be used throughout the run, 20 samples were taken with
four resistors in each sample. The data is shown below and is also
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Resistors for electronic circuits are manufactured on a
high-speed automated machine. The machine is set up to produce a
large run of resistors of 1,000 ohms each. Use Exhibit 10.13.
To set up the machine and to create a control chart to be used
throughout the run, 15 samples were taken with four resistors in
each sample. The complete list of samples and their measured values
are as follows: Use three-sigma control limits.
a. Calculate the mean and range for...
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high-speed automated machine. The machine is set up to produce a
large run of resistors of 1,000 ohms each. To create a control
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four resistors in each sample. The data is shown below and is also
available in the attached Excel file. Use MS Excel or Minitab to
develop X-bar and R charts, then determine if the process...
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