Examlex
Explain how quota sampling can be used to simulate stratified random sampling or proportionate stratified random sampling in situations where the entire population is not known.
Sleep Spindles
Bursts of oscillatory brain activity visible on an EEG that occur during stage 2 of NREM sleep, implicated in sleep maintenance and memory consolidation.
Stage 2 Sleep
A phase of sleep characterized by specific brain wave patterns including sleep spindles and K-complexes, representing a deeper sleep than stage 1.
EEG Activity
The recording of electrical activity along the scalp produced by the firing of neurons within the brain, typically referred to as electroencephalography.
Deep Sleep
A stage of sleep characterized by slow brain waves, reduced heart rate, and low body temperature, which is crucial for restorative sleep and health.
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