A Medical Journal Published the Results of an Experiment on Insomnia

question 81

Multiple Choice

A medical journal published the results of an experiment on insomnia. The experiment investigated the effectsof a controversial new therapy for insomnia. Researchers measured the insomnia levels of 90 adult women whosuffer moderate conditions of the disorder. After the therapy, the researchers again measured the womenʹsinsomnia levels. The differences between the the pre- and post-therapy insomnia levels were reported.Identify the experimental units.

• A) the 90 adult women who suffer from insomnia
• B) the differences between the pre- and post-therapy insomnia levels
• C) the disorder (insomnia or no insomnia)
• D) the therapy time period (pre or post)

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Definitions:

Queue Time

The total time that a product or job spends waiting in line to be processed at various stages of production.

Quality Cost Report

A document detailing the expenses incurred from preventing defects, appraising the quality of products, and any costs arising from products failing to meet quality standards.

Prevention Costs

Expenses incurred to avoid defects and improve quality in the production process, part of the broader category of quality costs.

Appraisal Costs

Costs associated with ensuring product or service quality, including costs for inspections, testing, and other quality assurance activities.