A Simple Random Sample Is

question 25

Multiple Choice

A simple random sample is

• A) any sample selected by using chance.
• B) any sample that gives every individual the same chance to be selected.
• C) a sample that gives every possible sample of the same size the same chance to be selected.
• D) a sample that selects equal numbers of individuals from each stratum.
• E) a sample that contains the same percent of each subgroup in the population.

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Definitions:

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles and is often used to treat sleep disorders.

REM Sleep

Rapid Eye Movement (REM) sleep, a unique phase of sleep involving vivid dreams, and is thought to play a role in learning and memory.

N3 Sleep

The third stage of non-REM sleep, characterized by deep sleep and the slowest brain waves during sleep, essential for restorative sleep.

N2 Sleep

A stage of sleep associated with the first instances of true sleep spindles and K-complexes, marking deeper sleep than N1.