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Periodicity is a common problem with using a systematic sampling method.
Vitamin D
A fat-soluble vitamin that is essential for maintaining the health of bones and teeth, supporting immune system function, and influencing mood and heart health.
Calcium
A chemical element essential for living organisms, primarily in bone formation and maintenance, as well as in various metabolic functions.
Electrocardiogram
A diagnostic test that measures the electrical activity of the heart to detect heart problems and monitor heart health.
Electroencephalogram
A medical test that measures electrical activity in the brain using small, flat metal discs attached to the scalp.
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Q60: The central-limit theorem states that as the