Fifteen samples of size 10 are taken from a stable process.The average of the sample means is 32.8,and the average range of the samples is 1.5.What is the upper control limit for the R chart? Use the information contained in the attached chart.
A)1.777
B)1.653
C)2.666
D)2.480

Question

Fifteen samples of size 10 are taken from a stable process.The average of the sample means is 32.8,and the average range of the samples is 1.5.What is the upper control limit for the R chart? Use the information contained in the attached chart. 
A)1.777 
B)1.653 
C)2.666 
D)2.480

Quizplus · Accepted Answer

The Answer of Fifteen samples of size 10 are taken from a stable process.The average of the sample means is 32.8,and the average range of the samples is 1.5.What is the upper control limit for the R chart? Use the information contained in the attached chart. 
A)1.777 
B)1.653 
C)2.666 
D)2.480

Fifteen Samples of Size 10 Are Taken from a Stable