Question: Sample 3 4 Hour 1 2 2 5 X R 1 21 20 19 20 20 N 15 17 40 16 6 10 5 7

Sample 3 4 Hour 1 2 2 5 X R 1 21 20 19 20 20 N 15 17 40 16 6 10 5 7 un 5 9 25 40 20 20 21 3 4 5 6 5 19 18 34 16 17 29 32 10 24 34 a) Determine the upper and lower X and R control chart limits. b) Do the data indicate a process that is in control? Why? UCLR = D.R UCL, = i + A,R LCL = -AR LCLR=D;R

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