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Level of measurement or scale of measure is a classification that describes the nature of information within the values assigned to variables. [1] Psychologist Stanley Smith Stevens developed the best-known classification with four levels, or scales, of measurement: nominal , ordinal , interval , and ratio .
Potrzebie is a humorous unit of length invented by Donald E. Knuth and published in Mad magazine. It is equal to the thickness of Mad issue 26, or 2.263 348 451 743 817 321 6473 mm.
Learn about the metric system, a decimal-based system of measurement that originated in France and is now used worldwide. Find out how the metric system evolved, what units it consists of, and how to use metric prefixes and conversions.
The International System of Units (SI) is the modern form of the metric system and the world's most widely used system of measurement. It consists of seven base units, 22 derived units with special names and symbols, and 24 prefixes for decimal multiples and submultiples.
Learn about various units of measurement that are not part of a coherent system, such as centimorgan, rack unit, or hand. Find out their definitions, examples, and origins from this Wikipedia article.
Learn about the process and science of measurement, from ancient standards to modern units. Explore the history, methodology, and applications of measurement in various fields and disciplines.
Learn about the microscopic scale, the range of objects and events that are too small to be seen by the naked eye, but can be observed with a microscope. Explore the history of microscopy, the types of microscopes, and the uses of microscopic measurements in biology, forensics, gemology, and infrastructure.
The concept of data type is similar to the concept of level of measurement, but more specific. For example, count data requires a different distribution (e.g. a Poisson distribution or binomial distribution) than non-negative real-valued data require, but both fall under the same level of measurement (a ratio scale).
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