A Quality Analyst wants to construct a control chart for determining whether fou

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 particular quality attribute. According she inspected 1,000 units of output from each machine in random samples, with the following results: #1 #2 #3 23 15 29 13 What is the estimate of the standard deviation of the sampling distribution of sample proportions for whenever this process is under control? O a) .016 0 b) .00016 O c) .04 O d) .0044

Explanation / Answer

A quality analyst wants to construct a control chart for data mining weather for machines, all producing the same product, are under control with regard to a particular quality attribute. Accordingly, she infected 1000 units of output from each machine in random samples with the following result.

What is the estimate of standard deviation of the sampling distribution of sample proportions for whenever the process is under control.

Answer - B. .00016

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