A Quality Analyst Wants to Construct a Control Chart for Determining

question 111

Multiple Choice

A quality analyst wants to construct a control chart for determining whether four machines, all producing the same product, are in 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: $$\begin{array} { c c } \text { Machine } & \text { Total Defectives } \\\hline \# 1 & 23 \\\# 2 & 15 \\\# 3 & 29 \\\# 4 & 13\end{array}$$
What are the control chart upper and lower control limits for an alpha risk of .05?

• A) .0272 and .0128
• B) .0287 and .0113
• C) .029 and .013
• D) .0303 and .0097
• E) .0332 and .0068

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