A Quality Control Engineer Is in Charge of the Manufacture

question 30

Multiple Choice

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," which of the following tests will you use to find out if the Kohler method is worse than the Russell method?

• A) Paired t test
• B) Z test for difference in proportions
• C) X² test for difference in proportions
• D) McNemar test

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Definitions:

Cognitive Performance

The effectiveness of processes such as attention, memory, reasoning, and problem-solving in the functioning of the mind.

Memory Study

An investigation or research focused on understanding various aspects of memory, including its processes, types, and factors affecting its accuracy.

Dinosaurs

Dinosaurs were a diverse group of reptiles that lived during the Mesozoic Era, ranging from small feathered creatures to the largest land animals that have ever existed.

Heuristic Approach

A problem-solving strategy that employs a practical method, not guaranteed to be optimal, perfect, or rational, but sufficient for reaching an immediate goal.