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Deviation is the action of being or doing something different from the usual or common way, or the amount by which a measurement is different from a fixed number or amount. Learn more about the meaning, usage and examples of deviation in English and Business English.
Learn the meaning of deviation as an act or instance of deviating, such as a departure from a norm, a standard, or a course. See synonyms, examples, word history, and related phrases of deviation.
Plot of standard deviation of a random distribution. In mathematics and statistics, deviation serves as a measure to quantify the disparity between an observed value of a variable and another designated value, frequently the mean of that variable.
Standard deviation may be abbreviated SD, and is most commonly represented in mathematical texts and equations by the lowercase Greek letter σ (sigma), for the population standard deviation, or the Latin letter s, for the sample standard deviation.
Deviation definition: the act of deviating.. See examples of DEVIATION used in a sentence.
The standard deviation is a measure of how close the numbers are to the mean. If the standard deviation is big, then the data is more "dispersed" or "diverse". As an example let's take two small sets of numbers: 4.9, 5.1, 6.2, 7.8 and 1.6, 3.9, 7.7, 10.8 The average (mean) of both these sets is 6.
Anything that varies from the accepted norm or standard is called a deviation. It is common in math and science, but it can refer to anything that differs from the expected. Deviation in nature is an important part of evolution.
