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

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

Quizplus · Accepted Answer

The lower limit of the sample averages chart can be calculated using the formula: $ \text{Lower Limit} = \bar{X} - A_2 \times R $, where $ \bar{X} $ is the overall average, $ A_2 $ is a constant that depends on the sample size (for a sample size of 10, $ A_2 = 0.308 $), and $ R $ is the average range. Plugging in the given values: $ 8 - 0.308 \times 0.1 = 7.9692 $.

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