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  2. Sampling (statistics) - Wikipedia

    en.wikipedia.org/wiki/Sampling_(statistics)

    A visual representation of the sampling process. In statistics, quality assurance, and survey methodology, sampling is the selection of a subset or a statistical sample (termed sample for short) of individuals from within a statistical population to estimate characteristics of the whole population.

  3. Sanskrit - Wikipedia

    en.wikipedia.org/wiki/Sanskrit

    Examples of the former include ahám (first singular), vayám (first plural) and yūyám (second plural). The latter can be demonstrative, deictic or anaphoric. [ 225 ] Both the Vedic and Classical Sanskrit share the sá/tám pronominal stem, and this is the closest element to a third person pronoun and an article in the Sanskrit language.

  4. Vacuum tube - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube

    Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.