A Manager Wishes to Build a 3-Sigma Range Chart for a Process

Multiple Choice

A manager wishes to build a 3-sigma 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 in the text, the appropriate value of D₃ is 0, and D₄ is 2.115. The UCL and LCL for this range chart are

A) 33.9 and 11.2.
B) 33.9 and 0.
C) 11.2 and 0.
D) 6.3 and 0.
E) 31.91 and 0.11.