Sample Size, n	Mean Factor, A2	Upper Range, D4	Lower Range, D3
2	1.880	3.268	0
3	1.023	2.574	0
4	0.729	2.282	0
5	0.577	2.115	0
6	0.483	2.004	0
7	0.419	1.924	0.076
8	0.373	1.864	0.136
9	0.337	1.816	0.184
10	0.308	1.777	0.223
12	0.266	1.716	0.284

Next question Refer to Table 56.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. Sampling 4 pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results: R Hour R Hour R Hour R Hour 1 1 2 3 4 5 6 x 3.15" 3.00 3.32 3.49 3.17 2.96 0.76" 1.23 1.43 1.21 1.17 0.37 7 8 9 9 10 11 12 x 3.05" 2.65 3.02 2.85 2.73 3.07 0.48" 1.13 0.66 1.28 1.22 0.35 13 14 15 16 17 18 X 3.21" 2.73 3.22 2.74 2.86 2.74 0.85" 1.26 1.11 0.55 1.48 1.29 19 20 21 22 23 24 4.51" 2.89 2.55 3.38 2.84 2.74 1.66" 1.14 1.03 0.41 1.53 1.02 Based on the sampling done, the control limits for 3-sigma x chart are (round all intermediate calculations to three decimal places before proceeding with further calculations): Upper Control Limit (UCL :) - inches (round your response to three decimal places). = Lower Control Limit (LCL;) = inches (round your response to three decimal places). Based on the x-chart, the wire cutting process has been The control limits for the 3-sigma R-chart are (round all intermediate calculations to three decimal places before proceeding with further calculations): Upper Control Limit (UCLA) - inches (round your response to three decimal places). Lower Control Limit (LCLA) = inches (round your response to three decimal places). Based on the R-chart, the wire cutting process has been