random sample

noun Statistics.

a method of selecting a sample (random sample) from a statistical population in such a way that every possible sample that could be selected has a predetermined probability of being selected.

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Origin:
1895–1900

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Random sample is always a great word to know.

So is gobo. Does it mean:

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

a fool or simpleton; ninny.

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WordNet

random sample
noun
1.	a sample in which every element in the population has an equal chance of being selected
2.	a sample grabbed at random

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"Musick is certainly a very agreeable Entertainment, but if it would take the entire Possession of our Ears, if it would make us incapable of hearing Sense, if it would exclude Arts that have a much greater Tendency to the Refinement of human Nature; I must confess I would allow it no better Quarter than Plato has done, who banishes it out of his Common-wealth."

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