Use the following table to answer the question(s) below.

-A machine shop owner wishes to monitor the diameter of an engine boring operation where the piston bore should be 4.25". He obtains 8 samples of 5 and records the data in the table above. What should the upper and lower control limits be for an R chart?
A) (5.00, 8.00)
B) (0.00, 2.50)
C) (4.33, 5.12)
D) (0.00, 1.45)
E) (-5.10, 5.10)

Question

Use the following table to answer the question(s) below.
 
-A machine shop owner wishes to monitor the diameter of an engine boring operation where the piston bore should be 4.25". He obtains 8 samples of 5 and records the data in the table above. What should the upper and lower control limits be for an R chart?
A) (5.00, 8.00) 
B) (0.00, 2.50) 
C) (4.33, 5.12) 
D) (0.00, 1.45) 
E) (-5.10, 5.10)

Quizplus · Accepted Answer

The R chart control limits are calculated using the range of the samples and the appropriate factors for the sample size. For a sample size of 5, the factors are D3 = 0 and D4 = 2.114. The upper control limit is D4 times the average range, and the lower control limit is D3 times the average range.

Use the Following Table to Answer the Question(s) Below