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  2. Product sample - Wikipedia

    en.wikipedia.org/wiki/Product_sample

    A free sample or "freebie" is a portion of food or other product (for example beauty products) given to consumers in shopping malls, supermarkets, retail stores, or through other channels (such as via the Internet). [1] Sometimes samples of non-perishable items are included in direct marketing mailings. The purpose of a free sample is to ...

  3. 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 ...

  4. Sample - Wikipedia

    en.wikipedia.org/wiki/Sample

    USS Sample, a frigate in the U.S. Navy; The Sample, a defunct department store in Buffalo, New York, U.S. SAMPLE history, a mnemonic acronym for questions that medical first responders should ask; Product sample, a sample of a consumer product that is given to the consumer so that they may try a product before committing to a purchase

  5. Production part approval process - Wikipedia

    en.wikipedia.org/wiki/Production_part_approval...

    Production part approval process. Production Part Approval Process (PPAP) is used in the Aerospace or automotive supply chain for establishing confidence in suppliers and their production processes. Actual measurements are taken from the parts produced and are used to complete the various test sheets of PPAP.

  6. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    Sample size determination or estimation is the act of choosing the number of observations or replicates to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample size used in a study is usually determined ...

  7. Food sampling - Wikipedia

    en.wikipedia.org/wiki/Food_sampling

    Food sampling. Food sampling is a process used to check that a food is safe and that it does not contain harmful contaminants, or that it contains only permitted additives at acceptable levels, or that it contains the right levels of key ingredients and its label declarations are correct, or to know the levels of nutrients present.

  8. Distribution of the product of two random variables - Wikipedia

    en.wikipedia.org/wiki/Distribution_of_the...

    Multiple non-central correlated samples. The distribution of the product of correlated non-central normal samples was derived by Cui et al. and takes the form of an infinite series of modified Bessel functions of the first kind. Moments of product of correlated central normal samples. For a central normal distribution N(0,1) the moments are

  9. Acceptance sampling - Wikipedia

    en.wikipedia.org/wiki/Acceptance_sampling

    Acceptance sampling uses statistical sampling to determine whether to accept or reject a production lot of material. It has been a common quality control technique used in industry. It is usually done as products leave the factory, or in some cases even within the factory. Most often a producer supplies a consumer with several items and a ...