Quality management

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Part manufactured by an injection modeling process are subjected to a compressive strength test. Five samples of three parts each are collected, and the compressive strengths (in psi) are shown in the following table.

(a) Establish x-bar and R control charts for compressive strength using these data.

(b) Apply Western Electric Rules to these charts. Is the process in statistical control?

(C) Estimate the process mean and standard deviation.

QUESTION 2 Part manufactured by an injection modeling process are subjected to a compressive strength test. Five samples of three parts each are collected, and the compressive strengths (in psi) are shown in the following table. (a) Establish x-bar and R control charts for compressive strength using these data. (b) Apply Western Electric Rules to these charts. Is the process in statistical control? (c) Estimate the process mean and standard deviation. Sample Number x1 x2 X3 x bar R 1 84.6 81.2 79 81.60 5.60 2 88.6 84.2 75.8 83.32 84.3 3 82.9 81.00 8.50 4 70.2 74.4 72.5 72.37 5 78.8 78.4 82.6 4.20 Grand Average Average Range Selected Answer: Q 2.docx Remove Attach File Browse My Computer Browse Content Collection