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 13.7. 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. SAMPLE NUMBER 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 READINGS (IN OHMS) 985 974 1021 990 1028 1027 1016 992 981 1016 1000 976 1018 1027 1015 1002 974 976 999 1024 1009 994 977 993 1012 972 Sample Number 998 993 997 996 972 1009 1006 1027 1027 1015 992 986 979 987 1028 974 994 1010 990 1024 990 1000 1006 1018 1015 1015 1004 977 1018 1020 a. Calculate the mean and range for the above samples. (Round "Mean" to 2 decimal places and "Range" to the nearest whole number.) 979 1025 1019 1009 Mean Range

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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 13.7.
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.
1
2
3
4
5
SAMPLE
NUMBER
6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
7
8
9
10
11
12
13
14
15
976
1018
1027
1015
1002 1016
981
1016
1000
997
996
READINGS (IN OHMS)
998
985
979
993
974
1025
1021
990
1019
1028 1027
1009
992
972
1009 1006
1027
1027
1015
992
986
979
987
1028
994 1010
1024
990
1000 1006 1018
1015
1015
1004
977
1018
1020
974
976
999
a. Calculate the mean and range for the above samples. (Round "Mean" to 2 decimal places and "Range" to the nearest whole
number.)
1024
1009
994
977
993
1012
972
Sample Number
974
990
Mean
Range
Transcribed Image Text: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 13.7. 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. 1 2 3 4 5 SAMPLE NUMBER 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 7 8 9 10 11 12 13 14 15 976 1018 1027 1015 1002 1016 981 1016 1000 997 996 READINGS (IN OHMS) 998 985 979 993 974 1025 1021 990 1019 1028 1027 1009 992 972 1009 1006 1027 1027 1015 992 986 979 987 1028 994 1010 1024 990 1000 1006 1018 1015 1015 1004 977 1018 1020 974 976 999 a. Calculate the mean and range for the above samples. (Round "Mean" to 2 decimal places and "Range" to the nearest whole number.) 1024 1009 994 977 993 1012 972 Sample Number 974 990 Mean Range
b. Determine X and R. (Round your answers to 3 decimal places.)
X
R
c. Determine the UCL and LCL for a X chart. (Round your answers to 3 decimal places.)
UCL
LCL
d. Determine the UCL and LCL for R-chart. (Leave no cells blank - be certain to enter "0" wherever required. Round your answers to
3 decimal places.)
UCL
LCL
e. What comments can you make about the process?
O The process is in statistical control.
O The process is out of statistical control.
Transcribed Image Text:b. Determine X and R. (Round your answers to 3 decimal places.) X R c. Determine the UCL and LCL for a X chart. (Round your answers to 3 decimal places.) UCL LCL d. Determine the UCL and LCL for R-chart. (Leave no cells blank - be certain to enter "0" wherever required. Round your answers to 3 decimal places.) UCL LCL e. What comments can you make about the process? O The process is in statistical control. O The process is out of statistical control.
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