The management of a line that fills cereal boxes wants the box filled at 32.2 ounces. When the process is in control, the standard deviation is .1 ounces
a. Construct the upper and lower control limits for a 3-sigma x-bar chart using a sample size of five.
b. The results from the last 10 samples follow. Is the process in control?
x-bar = 32.2, σ = .1
Control limits for chart:
UCL, LCL = ± 3σ = 32.2 ± 3(.1 ) = 32.5, 31.9
The process is in control.
Business
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