A Team of Researchers Examines the Time Spent in REM

question 240

Multiple Choice

A team of researchers examines the time spent in REM sleep and in each of the NREM stages among a large sample of adults ranging in age from 18 to 70 years old. The researchers compute three correlation coefficients: Correlation A, between participant age and total time spent in NREM Stages 1 and 2; Correlation B, between participant age and total time spent in REM sleep; and, finally, Correlation C, between participant age and total time spent in NREM Stages 3 and 4. Of these correlations, which should be the weakest? Which should be the strongest? This makes no sense - (Stages 1-4) are collectively called nonREM sleep, or NREM so Stages 3 and 4 being is wrong.

• A) Correlation B should be the weakest. Correlation A should be the strongest.
• B) Correlation B should be the weakest. Correlation C should be the strongest.
• C) Correlation C should be the weakest. Correlation A should be the strongest.
• D) Correlation A should be the weakest. Correlation C should be the strongest.

---

Definitions:

Income Tax

A tax levied by a government directly on an individual's or organization's income.

Interstate Highway System

A network of controlled-access highways that forms part of the National Highway System of the United States, designed to promote efficient interstate travel and commerce.

Environmental Protection

Efforts and policies aimed at safeguarding the natural environment from degradation due to human activities, ensuring the health and sustainability of ecosystems.

Scientific Research

The systematic investigation and study of materials, sources, etc., in order to establish facts and reach new conclusions.