Question: Every half hour, the quality control inspector checks a process by measuring four pieces and records the outside diameters of each of them, as shown

Every half hour, the quality control inspector checks a process by measuring four pieces and records the outside diameters of each of them, as shown below.
\table[[,SAMPLE PIECE],[,,1,2,3,4],[TIME,9:00AM,1,4,5,2],[9:30 AM,?bar(2),32,2,1],[10:00AM,1,7,3,5]]
What are the upper and lower limits of the range chart? (Hint You will need to use the "Factors for Control Charts" table)
2.282 and 4
9.128 and 0
100 and 0
2.282 and 0
 Every half hour, the quality control inspector checks a process by

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