Why Do Opinion Polls Usually Report a Margin of Error

question 91

Essay

Why do opinion polls usually report a margin of error with the results of a survey? What does the margin of error mean?

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Definitions:

Stage 1 Sleep

The initial phase of the sleep cycle, characterized by light sleep and ease of awakening.

Slow-Wave Sleep

A deep stage of sleep characterized by low-frequency, high-amplitude brain waves, associated with physical and mental restoration.

Melatonin

A hormone produced by the pineal gland that regulates sleep and wakefulness, often referred to as the "sleep hormone."

Circadian Rhythm

The physical, mental, and behavioral changes that follow a 24-hour cycle, primarily responding to light and darkness in an organism's environment.