Table 16-1
-Refer to Table 16-1. The average range of a process for packaging cereal is 1.1 ounces. If the sample size is 10, find the upper control chart limit for the range chart.
A) 0.245
B) 1.955
C) 1.777
D) 0.223
E) None of the above

Question

Table 16-1 
-Refer to Table 16-1. The average range of a process for packaging cereal is 1.1 ounces. If the sample size is 10, find the upper control chart limit for the range chart.
A) 0.245 
B) 1.955 
C) 1.777 
D) 0.223 
E) None of the above

Quizplus · Accepted Answer

Upper control chart limit for the range chart = D4 x R̅ = 2.704 x 1.1 = 2.9744
Upper control limit = Bar R + A2 = 1.1 + (0.577 x 2.9744) = 1.72444
Therefore, the upper control chart limit for the range chart is 1.955 (Option B).

Table 16-1 -Refer to Table 16-1. the Average Range of a Process