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The quality engineer in charge of a salt packaging process is concerned about the moisture content in packages of salt. Five packages of salt are sampled each time, and the moisture content in cach package is measured as the percentage of total weight. The data is shown in the following table: Sample 23 261 3 4 3 6 7 200 29 24 2346 2018 20 27 R . 015 059 0.45 0 11 2 10 Sample Valor 251 20 2235 267 221 20 21 226 3.51 256 3151 264 16 2212 25 300 To 26 101 27 254 286 322222 100 271 2 10 295 50 2.59 314 2:54 3.77 289 329 325 115 11 136235 21 307 3:14 21 32129 104 F6529 21 274 299 300 230 270303365 BE 24 2374 2T 09 016 0.74 0.79 095 1012 12 13 14 19 16 17 IN 19 20 29 123 33 119 319 25 30 3.286 39 30 074 0.0 061 04 04 0.32 04 16 29 2754 200 1) Estimate the process standard deviation, using R. 2) Establish the control limits (UCL, CL, and LCL) for Rchart (Assume a = 0.0026)
3) Establish the control limits (UCL, CL, and LCL) for X-bar chart (Assume a = 0.0026) 4) If the specification limits are 2.70 0.15, find the process capability indices Cp and Cpk.
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