Twelve samples, each containing five parts, were taken from a process that produces steel rods at Emmanual Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results were: Sample Sample Mean (in.) Range (in.) Sample Sample Mean (in.) Range (in.) 1 9.700 0.044 7 9.703 0.021 2 9.700 0.051 8 9.707 0.058 3 9.689 0.042 9 9.695 0.039 4 9.706 0.037 10 9.701 0.038 5 9.695 0.048 11 9.703 0.054 6 9.699 0.053 12 9.706 0.061 Based on the sampling done, the control limits for 3-sigma x chart are: Upper Control Limit (UCLx) = [ 9.7266] enter your response here inches (round your response to four decimal places). Lower Control Limit (LCLx) = [ 9.6740 ] enter your response here inches (round your response to four decimal places). For the given data, the R = [ 0.0455 ] inches (round your respone to four decimal places). The control limits for the 3-sigma R-chart are: Upper Control Limit (UCLR) = [ ? ] enter your response here inches (round your response to four decimal places).
Twelve samples, each containing five parts, were taken from a process that produces steel rods at Emmanual Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results were:
Sample Sample Mean (in.) Range (in.) Sample Sample Mean (in.) Range (in.)
1 9.700 0.044 7 9.703 0.021
2 9.700 0.051 8 9.707 0.058
3 9.689 0.042 9 9.695 0.039
4 9.706 0.037 10 9.701 0.038
5 9.695 0.048 11 9.703 0.054
6 9.699 0.053 12 9.706 0.061
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