Which of the Following Is True of the Sleep Cycle

question 114

Multiple Choice

Which of the following is true of the sleep cycle during a night of sleep?

• A) Each non-REM/REM cycle lasts about 45 minutes.
• B) Subjects first enter REM sleep and then transition to non-REM sleep.
• C) As the night goes on, the relative length of REM sleep increases in each successive cycle.
• D) Stages 3 and 4 of slow-wave sleep mostly occur in the early morning hours.
• E) Sleep cycles are random across the night.

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Definitions:

SSE

Short for Sum of Squared Errors, a measure used in statistics to describe the total deviation of data points from their fitted values in a regression analysis.

Y-intercept

The point where a line, curve, or function crosses the y-axis of a graph.

Dependent Variable

In an experiment or statistical model, the variable that is expected to change as a result of manipulations in the independent variable.

Independent Variable

A factor in a study or simulation that is deliberately altered to see its impact on a variable that depends on it.