A machine that is supposed to produce ball bearings with a diameter of 7 millimeters yields the following data
from a test of 5 ball bearings every 20 minutes. 
Definitions:
REM Rebound
The phenomenon where there is an increase in REM sleep after being deprived of it, often experienced during recovery from sleep deprivation.
Alpha Waves
Brainwave patterns associated with a relaxed yet awake state, typically occurring when a person is calm and alert.
Sleep Spindles
Short bursts of brain activity characterized by rapid oscillations, observed in EEG readings during certain stages of sleep.
Manifest Content
According to Freudian psychoanalytic theory, the surface level of dreams, containing the dream symbols that are remembered upon waking.
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