A Quality Analyst Wants to Construct a Control Chart for Determining

question 52

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: $$\begin{array} { l c } \text { Machine } & \text { Total Defectives } \\\hline \# 1 & 23 \\\# 2 & 15 \\\# 3 & 29 \\\# 4 & 13\end{array}$$ For upper and lower control limits of .026 and .014, which machine(s) , if any, appear(s) to be out-of-control for process proportion of defectives?

• A) machine #3
• B) machine #4
• C) machines #3 and #4
• D) machines #2 and #3
• E) none of the machines

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Definitions:

Gibberellins

Plant hormones that regulate growth and influence various developmental processes, including stem elongation, germination, and flowering.

Two-stage Life Cycle

A biological lifecycle that consists of two distinct stages, typically involving a transformation between juvenile and adult forms.

Adaptation

The process by which a species becomes better suited to its environment through genetic changes over generations.

Ethylene

Ethylene is a colorless gas hormone in plants, regulating various aspects of growth, ripening, and response to stress conditions.