Question

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, the appropriate value of d3 is​ 0, and d4 is 2.115. what are the ucl and​ lcl, respectively, for this range​ chart?

a. 6.3 and 0
b. 33.9 and 0
c. 11.2 and 0
d. 33.9 and 11.2
e. 31.91 and 0.11

Answer 1

the answer is:
c. 11.2 and 0