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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    Yes. Website. iso .org /standard /75839 .html. Portable Document Format ( PDF ), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.

  3. PDF417 - Wikipedia

    en.wikipedia.org/wiki/PDF417

    PDF417. PDF417 is a stacked linear barcode format used in a variety of applications such as transport, identification cards, and inventory management. "PDF" stands for Portable Data File. The "417" signifies that each pattern in the code consists of 4 bars and spaces in a pattern that is 17 units (modules) long.

  4. PDF/A - Wikipedia

    en.wikipedia.org/wiki/PDF/A

    Standard. ISO 19005. PDF/A is an ISO -standardized version of the Portable Document Format (PDF) specialized for use in the archiving and long-term preservation of electronic documents. PDF/A differs from PDF by prohibiting features unsuitable for long-term archiving, such as font linking (as opposed to font embedding) and encryption. [1]

  5. Poisson distribution - Wikipedia

    en.wikipedia.org/wiki/Poisson_distribution

    The Poisson distribution is a good approximation of the binomial distribution if n is at least 20 and p is smaller than or equal to 0.05, and an excellent approximation if n ≥ 100 and n p ≤ 10. [31] Letting and be the respective cumulative density functions of the binomial and Poisson distributions, one has:

  6. I-20 (form) - Wikipedia

    en.wikipedia.org/wiki/I-20_(form)

    The Form I-20 (also known as the Certificate of Eligibility for Nonimmigrant (F-1) Student Status-For Academic and Language Students) is a United States Department of Homeland Security, specifically ICE and the Student and Exchange Visitor Program (SEVP), document issued by SEVP-certified schools (colleges, universities, and vocational schools) that provides supporting information on a student ...

  7. Sampling (statistics) - Wikipedia

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

    Sampling (statistics) 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. The subset is meant to reflect the whole population and statisticians ...

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