Sample size (n) is 9, average of the sample ranges (R¯)is 4. Calculate the UCL and LCL of the range chart for this process.nA2D3D421.8800.0003.26731.0230.0002.57540.7290.0002.28250.5770.0002.11460.4830.0002.00470.4190.0761.92480.3730.1361.86490.3370.1841.816100.3080.2231.777 UCL = 3.82, LCL = 2.18Cannot be calculatedUCL=7.26, LCL=0.74UCL = 2.18, LCL = 3.82UCL=0.74, LCL=7.26

Range chart or R chart is a control chart to find whether sample size of the process is under the control limit or exceeds. Formula: R bar = 4 Sample size = 9 D3 = 0.184 D4 = 1.816 calculation Therefore UCL is 7.264 and LCL is 0.736.

Answered: Sample size (n) is 9, average of the…

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Sample size (n) is 9, average of the sample ranges (R¯)is 4. Calculate the UCL and LCL of the range chart for this process.

n	A2	D3	D4
2	1.880	0.000	3.267
3	1.023	0.000	2.575
4	0.729	0.000	2.282
5	0.577	0.000	2.114
6	0.483	0.000	2.004
7	0.419	0.076	1.924
8	0.373	0.136	1.864
9	0.337	0.184	1.816
10	0.308	0.223	1.777

UCL = 3.82, LCL = 2.18

Cannot be calculated

UCL=7.26, LCL=0.74

UCL = 2.18, LCL = 3.82

UCL=0.74, LCL=7.26

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