Question: A Quality Analyst wants to construct a control chart for determining whether four machines, all producing the same product, are under control with regard to

A Quality Analyst wants to construct a control chart for determining

A Quality Analyst wants to construct a control chart for determining whether four machines, all producing the same product, are under control with regard to a particular quality attribute. Accordingly, she inspected 1,000 units of output from each machine in random samples, with the following results: What is the sample proportion of defectives for machine \#1? .023 .043 .23 .43

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