Table 15-1

-Use the data shown below and the information in Table 15-1 to develop an upper control limit for a control chart that monitors central tendency.What is the upper control limit?
A)0
B)1.17
C)10.82
D)11.99

Question

Table 15-1
 
-Use the data shown below and the information in Table 15-1 to develop an upper control limit for a control chart that monitors central tendency.What is the upper control limit? 
A)0 
B)1.17 
C)10.82 
D)11.99

Quizplus · Accepted Answer

To calculate the upper control limit for monitoring central tendency, we can use the formula:
Upper control limit = X̄ + 3σ/√n
From Table 15-1, we can see that the mean, X̄, is 10.82 and the standard deviation, σ, is 0.585. Assuming a sample size of n=1 (individual measurements), we can plug in these values and calculate the upper control limit:
Upper control limit = 10.82 + 3(0.585)/√1
Upper control limit = 12.57
Therefore, the closest choice is C, 10.82 is the correct upper control limit.

Table 15-1 -Use the Data Shown Below and the Information in Table