A Quality Analyst Wants to Construct a Control Chart for Determining

question 48

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 standard deviation of the sampling distribution of sample proportions for whenever this process is under control?

• A) .016
• B) .00016
• C) .04
• D) .0044
• E) .00002

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Definitions:

Questionnaires

A set of written questions used to collect information from respondents, often for the purposes of research, survey, or assessment.

Causality

The relationship between cause and effect, where one event (the cause) directly leads to the outcome (the effect).

Experiments

Scientific procedures undertaken to discover, test, or demonstrate a hypothesis or to determine the efficacy of something previously untried.

Survey Studies

Research methodologies that collect data from a specific population sample via questionnaires or interviews to analyze trends, attitudes, or behaviors.