Table 15-1

-Refer to Table 15-1.The average range of a process for packaging cereal is 1.1 ounces.If the sample size is 10, find the lower control chart limit for the range chart.
A)0.245
B)1.955
C)1.777
D)0.223

Question

Table 15-1
 
-Refer to Table 15-1.The average range of a process for packaging cereal is 1.1 ounces.If the sample size is 10, find the lower control chart limit for the range chart.
A)0.245 
B)1.955 
C)1.777 
D)0.223

Quizplus · Accepted Answer

The lower control limit (LCL) for a range chart is calculated using the formula LCL = D3 * R-bar. For a sample size of 10, the D3 value is 0.223. Therefore, LCL = 0.223 * 1.1 = 0.2453, which rounds to 0.245.

Table 15-1 -Refer to Table 15-1.The Average Range of a Process for of a Process