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Raw data (sometimes colloquially called "sources" data or "eggy" data, the latter a reference to the data being "uncooked", that is, "unprocessed", like a raw egg) are the data input to processing. A distinction is made between data and information, to the effect that information is the end product of data processing. Raw data that has ...
Publication data: 1820 (3rd ed.) Online version: Internet Archive ; CNRS , with more accurate character recognition; Gallica-Math , complete PDF and PDFs by section Description: Introduced the Laplace transform , exponential families , and conjugate priors in Bayesian statistics .
Secondary data refers to data that is collected by someone other than the primary user. [1] Common sources of secondary data for social science include censuses , information collected by government departments, organizational records and data that was originally collected for other research purposes. [ 2 ]
Sources of information are commonly categorized as primary, secondary, or tertiary sources.In brief, a primary source is one close to the event with firsthand knowledge (for example, an eyewitness); a secondary source is at least one step removed (for example, a book about an event written by someone not involved in it); and a tertiary source is an encyclopaedia or textbook that provides a ...
Primary, or "statistical" sources are data that are collected primarily for creating official statistics, and include statistical surveys and censuses. Secondary, or "non-statistical" sources, are data that have been primarily collected for some other purpose (administrative data, private sector data etc.).
A primary source can have all of these qualities, and a secondary source may have none of them. Deciding whether primary, secondary or tertiary sources are appropriate on any given occasion is a matter of good editorial judgment and common sense, not merely mindless, knee-jerk reactions to classification of a source as "primary" or "secondary".
Secondary market research can be broken up into two categories: information from internal sources such as an agency or company, and information from external sources held outside an organization or agency. [6] Secondary market research uses information from the past, reuses data already collected, and is more economical.
Examples in which a source can be both primary and secondary include an obituary [23] or a survey of several volumes of a journal counting the frequency of articles on a certain topic. [23] Whether a source is regarded as primary or secondary in a given context may change, depending upon the present state of knowledge within the field. [24]