A manager took samples of size n - 6 hourly from a process for 12 hours and determined the lower and upper control limits for the corresponding 2-chart as below: LCL = 89.5571 UCL - 95.6429 Table of Control Chart Constants Table of Control Chart Constants Sample D. D. Size A2 2 1.880 3.267 3 1.023 0 2.575 A 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 .864 9 0.337 0.184 1.816 10 0.308 0.223 1.777 11 0.285 0.256 1.744 12 0.266 0.283 1.71 13 0.249 0.307 1.693 14 0.235 0.328 1.672 15 0.223 0.347 1.653 16 0.212 0.363 1.637 17 0.203 0.378 1.622 18 0.194 0.391 1.609 19 0.187 0.404 1.596 20 0.180 0.415 1.585 21 0.173 0.425 1.579 22 0.167 0.435 1.565 23 0.162 0.443 1.557 24 0.157 0.452 1.548 25 0.153 0459 1.541 Calculate the following mean values accurate to 1 decimal place: a. 2 b. R Next