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A tractor used to prepare land for planting is called
Delta Waves
Delta waves are slow brainwaves, predominant in deep sleep, associated with healing and regeneration in the human brain.
Representative Sample
A subgroup of a population that accurately reflects the members of the entire population, enabling statistically valid conclusions.
Random Sample
A subset of a population selected for a study or survey in which each member has an equal chance of being chosen, ensuring the results are statistically representative of the whole.
Convenience Sample
A non-probability sampling method where the sample is taken from a group of people easy to contact or to reach.
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