A rum producer monitors the position of its label on the bottle
by sampling three bottles from each batch. One quantity measured is
the distance from the bottom of the bottle neck to the top of the
label. The process mean should be μ = 1.6 inches. Past
experience indicates that the distance varies with σ =
0.15 inch.
(a) The mean distance x for each batch sample is
plotted on an x control chart. Calculate the center line
and control limits. (Round your answers to three decimal
places.)
CL |
= |
in |
LCL |
= |
in |
UCL |
= |
in |
(b) The sample standard deviation s for each batch’s
sample is plotted on an s control chart. What are the
center line and control limits? (Round your answers to four decimal
places.)
CL |
= |
in |
LCL |
= |
in |
UCL |
= |
in |
