A Quality Analyst Wants to Construct a Control Chart for Determining

question 88

Multiple Choice

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: $$\begin{array} { l c } \text { Machine } & \text { Total Defectives } \\\hline \# 1 & 23 \\\# 2 & 15 \\\# 3 & 29 \\\# 4 & 13\end{array}$$ What is the estimate of the process proportion of defectives for whenever it is under control?

• A) .08
• B) .06
• C) .04
• D) .02
• E) .01

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Definitions:

Probability Distribution

An equation in mathematics that predicts the probabilities of distinct possible occurrences during an experiment.

Daily Sales

The total quantity or amount of products sold or transactions made in one day.

Registered Voters

Individuals who have completed the necessary procedures to be eligible to vote in an election.

Random Sample

A subset of individuals chosen from a larger set, where each individual is selected randomly and entirely by chance, ensuring that every subset of the population has an equal probability of being chosen.