Question: For the R-chart, what is the value of the upper control limit (UCL) [rounded to two spaces after the decimal)? Observation Number Sample 1 2 3 4 1 10.1 10.6 9.8 9.9 2 9.7 9.5 10.3 10.5 3 10.1 10.7 9.2 10 4 9.9 9.8 10.4 10.1 5 10.4 10.1 10.9 9.9 The control charts constant chart is given below: Factor for Factor for Sample Size Factor for LCL for R UCL for R Xb A2 in) arl } (D3) (D 4} 2 1.88 0 3.267 3 1.023 0 2.574 4 0.729 0 2.282 5 0.577 0 2.114 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.337 0.184 1.816 o 2.0? o 2.5? o 2.24 O 0.81