Joint Save Refer to Table 56.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. 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 Range (in.) 7 Sample Mean Range (in.) (in.) 9.204 0.033 9.200 0.041 9.191 0.034 9.204 0.051 9.197 0.031 9.201 0.036 1 2. 3 4 5 6 8 Sample Mean (in.) 9.201 9.205 9.197 9.203 9.201 9.206 9 0.041 0.034 0.027 0.029 0.039 0.047 10 11 12 For the given data, the x = 9 2008 inches (round your response to four decimal places). Based on the sampling done, the control limits for 3-sigma x chart are Upper Control Limit (UCLA) = 9.2221 inches (round your response to four decimal places). Lower Control Limit (LCL;) - inches (round your response to four decimal places). 1 Definition Sample Size, n Mean Factor, A Upper Range, D. Lower Range, D2 0 0 0 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0.308 0.266 4 5 6 7 8 9 10 12 O O O O O 3.268 2.574 2.282 2.115 2.004 1.924 1.864 1.816 1.777 1.716 0.076 0.136 0.184 0.223 0.284