The purity of a chemical product is measured on each batch. Purity determination for 20 successive batches
Question:
(a) Is purity normally distributed?
(b) Is the process in statistical process control?
(c) Estimate the process mean and standard deviation.
Transcribed Image Text:
TABLE 6E.30 Purity Data for Exercise 6.72 Batch Purity Batch Purity 0.81 2 0.82 3 0.81 40.82 5 0.82 0.83 7 0.81 0.80 9 0,81 10 0.82 1 081 12 13 0.81 14. 15 081 16 17 083 18 19 20 0.83 0.82 0.85 0.87 0.86 0.84
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Related Book For
Introduction to Statistical Quality Control
ISBN: 978-1118146811
7th edition
Authors: Douglas C Montgomery
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