Standard deviation | English homework help
A normally distributed quality characteristic is monitored through use of an and an R chart. These charts have the following parameters (n =4): Chart R Chart UCL = 626.0 UCL = 18.795 Center line = 620.0 Center line = 8.236 LCL = 614.0 LCL = 0 Both charts exhibit control. (a) What is the estimated standard deviation of the process? (b) Suppose an s chart were to be substituted for the R chart. What […]