Are the process mean and range in statistical control?
A production manager at Ultra Clean Dishwashing Company is monitoring the quality of the company’s production process. There has been concern relative to the quality of the operation in accurately ﬁlling the 16 ounces of dishwashing liquid. The product is designed for a ﬁll level of 16.00 0.30. The company collected the following sample data on the production process:
(a) Are the process mean and range in statistical control?
(b) Do you think this process is capable of meeting the design standard?