What are the UCL and LCL for this range chart?
A manager wishes to build a 3Ïƒ range chart for a process. The sample size is five, the mean of sample means is 16.01, and the average range is 5.3. From Table S6.1, the appropriate value of D3 is 0, and D4 is 2.115.
A. A.33.9 and 11.2 B. B.33.9 and 0 C. C.11.2 and 0 D. D.6.3 and 0 E. E.31.91 and 0.11
In a company, there may be a time when the manager needs to determine certain the upper control limit and the lower control limit which has to do with the in-control process.
Usually, the manager will try to find the mean of that process. Lower control limit is often referred by its abbreviation known as LCL and upper control limit is known as LCL. Therefore, the manager gathers some information including that there is a range chart for the process.
The sample size is five and the mean is 16.01. The average range is 5.3. The appropriate value is D3 is zero and D4 is 2.115. The UCL and LCL for this range chart is eleven point two and zero.