The purity of a chemical product is measured on each batch. Purity determination for 20 successive batches

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The purity of a chemical product is measured on each batch. Purity determination for 20 successive batches are shown in Table 6E.30.

(a) Is purity normally distributed?
(b) Is the process in statistical process control?
(c) Estimate the process mean and standard deviation.

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Introduction to Statistical Quality Control

ISBN: 978-1118146811

7th edition

Authors: Douglas C Montgomery

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Question Posted: Nov 06, 2015 03:14 AM

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The purity of a chemical product is measured on each batch. Purity determination for 20 successive batches

Question:

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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a Purity is not normally distributed Note that tran...View the full answer

Introduction to Statistical Quality Control

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