Question: A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to

A quality analyst wants to construct a control

A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results: Machine #1 17 16 23 15 25 #2 15 18 23 17 25 22 #3 24 Using the above data and the factor table below, please answer the following questions. Size of Sample (n) Factor for UCL and LCL for X-Chart (4) Factor for LCL for R-Chart (13) 0 Factor for UCL for R-Chart (D) 2 1.880 3.267 3 1.023 0 2.575 4. 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 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 Question 7 (5 points) What is the three-sigma level upper control limit for R-chart? (Answer in two decimal points) AV Question 8 (5 points) What is the three-sigma level lower control limit for R-chart? (Answer with a whole number.) AJ

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