Table 15-1
-Refer to Table 15-1.Bags of tea are sampled to ensure proper weight.The overall average for the samples is 8 ounces.Each sample contains 10 bags.The average range is 0.1 ounces.What is the lower limit of the sample averages chart?
A)7.9692
B)8.0308
C)7.9076
D)8.0924
E)None of the above

Question

Table 15-1 
-Refer to Table 15-1.Bags of tea are sampled to ensure proper weight.The overall average for the samples is 8 ounces.Each sample contains 10 bags.The average range is 0.1 ounces.What is the lower limit of the sample averages chart?
A)7.9692 
B)8.0308 
C)7.9076 
D)8.0924 
E)None of the above

Quizplus · Accepted Answer

The lower control limit (LCL) for the sample averages chart is calculated using the formula: LCL = X̄ - A2 * R̄. Here, X̄ = 8 ounces, R̄ = 0.1 ounces, and A2 for a sample size of 10 is approximately 0.308. Thus, LCL = 8 - (0.308 * 0.1) = 7.9692.

Table 15-1 -Refer to Table 15-1.Bags of Tea Are Sampled to Ensure