Q50

and 51

Considering our discussions on Statistical Process Control, SPC, according to the text, what is the most common choice of limits for control charts? \pm 1 standard deviation \pm 2 standard deviations \pm 3 standard deviations \pm 3 standard deviations for means and \pm 2 standard deviations for ranges \pm 6 standard deviations Considering our discussions on Statistical Process Control, SPC, a manager wishes to build a 3 -sigrna range chart for a process. The sample size is five, the mean of sample means is 16.01 , and the average range is 5.3. From Table S6.1, the appropriate value of D3 is 0 , and D4 is 2.115 . What are the UCL and LCL, respectively, for this range chart? 33.9 and 11.2 33.9 and 0 31.91 and 0.11 6.3 and 0 11.2 and 0