data

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data

[′dad·ə, ′dād·ə, or ′däd·ə]
(computer science)
General term for numbers, letters, symbols, and analog quantities that serve as input for computer processing.
Any representations of characters or analog quantities to which meaning, if not information, may be assigned.
(science and technology)
Numerical or qualitative values derived from scientific experiments.

data

(data, data processing, jargon)
/day't*/ (Or "raw data") Numbers, characters, images, or other method of recording, in a form which can be assessed by a human or (especially) input into a computer, stored and processed there, or transmitted on some digital channel. Computers nearly always represent data in binary.

Data on its own has no meaning, only when interpreted by some kind of data processing system does it take on meaning and become information.

For example, the binary data 01110101 might represent the integer 117 or the ASCII lower case U character or the blue component of a pixel in some video. Which of these it represents is determined by the way it is processed (added, printed, displayed, etc.). Even these numbers, characters or pixels however are still not really information until their context is known, e.g. my bank balance is ?117, there are two Us in "vacuum", you have blue eyes.

data

(1) Technically, raw facts and figures, such as orders and payments, which are processed into information, such as balance due and quantity on hand. However, in common usage, the terms "data" and "information" are used synonymously. In addition, the term data is really the plural of "datum," which is one item of data. But datum is rarely used, and data is used as both singular and plural in practice.

The amount of data versus information kept in the computer is a tradeoff. Data can be processed into different forms of information, but it takes time to sort and sum transactions. Up-to-date information can provide instant answers.

A common misconception is that software is also data. Software is executed, or run, by the computer. Data are "processed." Thus, software causes the computer to process data.

(2) Any form of information whether on paper or in electronic form. Data may refer to any electronic file no matter what the format: database data, text, images, audio and video. Everything read and written by the computer can be considered data except for instructions in a program that are executed (software).

(3) May refer only to data stored in a database in contrast with text in a word processing document.
References in periodicals archive ?
The conclusion in the paired data analysis can be used as the basis for an adjustment of comparable sales in the sales comparison approach after the taking.
In a paired data analysis the fee simple sale properties might not have the ability to hold gas in the subsurface (so the value of the storage rights would be zero); but even if that were true, the sales exactly reflect the value to the landowner whether the property has the capability to be developed for underground gas storage or not.
The Wilcoxon signed-ranks test was superior to the Wilcoxon rank-sum test for paired data, while the modified t test on ranks was slightly superior to both.
Means of the difference D are, as stated above, estimated from paired data.
Paired data analysis in ranch appraising is criticized by many informed appraisers.
71) [micro]g/L] showed a significant difference (Wilcoxon rank-sum test for paired data, P <0.
Although each method has several analytical techniques available to measure adjustments, the most commonly used are paired data analysis and the relative comparison technique.
These tests resulted in 1,001 separate paired data points for correlation analysis.
These 10 samples showed no significant difference between serum and plasma cTnI (t-test for paired data, P = 0.
Paired data analysis has two basic forms: matched-pairs analysis, which uses properties whose significant features are similar except for the date of sale, and pure pair, or repeat sales, analysis, which uses properties that have sold twice during a given period and have had no significant capital improvements during that interval.