At First the Subject Had Difficulty Falling Asleep in the Sleep

question 35

Multiple Choice

At first the subject had difficulty falling asleep in the sleep lab, but finally drifted into sleep and was not awakened when a student researcher knocked a can of soda off of the desk. The EEG is displaying a slow regular pattern with occasional sleep spindles. The researchers feel confident that the subject is

• A) about to wake up.
• B) now in stage 2 of the sleep cycle.
• C) dreaming.
• D) in REM sleep.

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Definitions:

Degrees of Freedom

The number of independent pieces of information available to estimate another parameter.

Expected Frequencies

The anticipated count of occurrences across different categories based on probability distributions in statistics.

Chi-Square Value

A statistical measure used in tests of independence and goodness of fit, indicating how expectations compare to actual observed data.

Degrees of Freedom

Degrees of freedom refer to the number of independent values or quantities that can vary in an analysis without breaking any constraints.