Develop an X bar chart and an r-chart and plot the values. From the charts, what comments can you make about the process?

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. 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 SAMPLE NUMBER READINGS (IN OHMs) 985 1015 1005 1010 986 1003 1020 1015 993 005 1020 989 1001 992 979 006 101 003 984 981 989 14 013 1002 1005