Instruction 10-14 A Quality Control Engineer Is in Charge of the Manufacture

question 119

Multiple Choice

Instruction 10-14
A quality control engineer is in charge of the manufacture of computer disks. Two different processes can be used to manufacture the disks. He suspects that the Kohler method produces a greater proportion of defects than the Russell method. He samples 150 of the Kohler and 200 of the Russell disks and finds that 27 and 18 of them, respectively, are defective. If Kohler is designated as "Group 1" and Russell is designated as "Group 2", perform the appropriate test at a level of significance of 0.01.
-Referring to Instruction 10-14,the hypotheses that should be tested are

• A) H₀: π₁ - π₂ ≠ 0 versus H₁: π₁ - π₂ = 0.
• B) H₀: π₁ - π₂ ≥ 0 versus H₁: π₁ - π₂ < 0.
• C) H₀: π₁ - π₂ = 0 versus H₁: π₁ - π₂ ≠ 0.
• D) H₀: π₁ - π₂ ≤ 0 versus H₁: π₁ - π₂ > 0.

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Definitions:

Aesthetic Quality

Aspects of a product, environment, or design that are pleasing to the senses, often related to beauty, artistry, and emotional response.

Quality Management System

A quality management system (QMS) is a structured set of processes and procedures aimed at ensuring that products, services, or operations meet specified quality standards and customer expectations.

Implementing

The process of putting into effect or action a plan, decision, or method.

QMS

Quality Management System, a formalized system that documents processes, procedures, and responsibilities for achieving quality policies and objectives.