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Ordinal variable
| Glossary of Statistical Terms |
A variable whose possible values have a natural order, such as {short, medium, long}, {cold, warm, hot}, or {0, 1, 2, 3, …}. in contrast, a variable whose possible values are {straight, curly} or {arizona, california, montana, new york} would not naturally be ordinal. arithmetic with the possible values of an ordinal variable does not necessarily make sense, but it does make sense to say that one possible value is larger than another.
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Ordinal, английский
A порядковый | n (pl ordinalia) порядковое числительное numeral
Ordinal attribute, английский
An ordinal attribute is one that takes on values whose order has external meaning but whose particular values or differences between values do not have meaning. an example is an unanchored rating by a person on a ninepoint scale. assigning one object a value of three and another a value of six does not imply that the second object has twice the value of the first. it only implies that it has more. by extension, you could also infer that the latter also has more than any other objects that are rated as 1, 2, 4, or 5 by the same person, and less than objects that are rated as 7, 8, or 9. the results of operations other than proportion level operations and order-specific counting (e.g., the number of cases with a score less than three) are dependent on the scaling, which is arbitrary. using techniques designed for continuous measures on ordinal variables often leads to misleading or silly results. see also: interval attribute, machine learning, logistic regression, nominal attribute (type), ratio attribute. ordinary least squares (ols) an ordinary least squares (ols) function uses the sum of the squared deviations between the observed and fitted values as its minimization criteria. this is equivalent to minimizing the euclidian distance between the pbserved and fitted values. variants include weighted least squares, which weights the individual squared differences according to a set of weights, least absolute deviations (lad) which minimize the absolute differences, and general lp criteria, where the p-th power of the absolute difference is minimized. ols and lad are l2 and l1, respectively. ols is known in the neural network literature as "least mean squares." the same acronym has been used in the neural network literature as orthogonal least squares a technique for forward stepwise selection in radial basis function (rbf) networks. the latter technique starts with a large set of candidate points and selects a subset that is useful for predictions. see also: radial basis function.
Ordinal data, английский
Порядковые данные. любые данные, которые могут быть упорядочены или ранжированы, то есть, подчиняются отношениям больше-меньше.
Ordinal linkage, английский
Связывание по порядковым номерам
Ordinal number, английский
A number whose form indicates position in an ordered sequence of items, such as first, third, or twentieth.
Ordinal numbers, английский
Numbers that refer to a specific number in a series and answer
Ordinal scale, английский
A measurement type for which the relative values of data are defined solely in terms of being lesser, equa-to or greater as compared with other data on the ordinal scale. these characteristics may arise from categorical rating scales, or from converting i
Ordinal type, английский
Порядковый тип; перечислимый тип
Ordinal value, английский
Порядковое значение
Ordinal variable., английский
A variable whose possible values have a natural order, such as {short, medium, long}, {cold, warm, hot}, or {0, 1, 2, 3, …}. in contrast, a variable whose possible values are {straight, curly} or {arizona, california, montana, new york} would not naturall
Ordinalis [e], латинский
Ordinalzahl, ordnungszahl, немецкий
Vari- nozzle, английский
Переменная форсунка, изменяемый насадок
Vari-focal, английский
Низкой по цене вариант зум объектива разработаны для удовлетворения потребностей инсталляторов в универсальности. этот объектив не имеет возможности отслеживать, как широкий к телефото.
Variabie, английский
Variabilis, латинский
Variabilis [e], латинский
Variabilis, e, латинский
Variabilität, немецкий
Variabilitas, atis, f, латинский
California, английский
In 1849, large numbers of people moved to california because gold had been discovered there.
Arithmetic, английский
The art of computation by numbers; or that branch which considers their powers and properties.
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Categorical variable, английский
- A variable whose value ranges over categories, such as {red, green, blue}, {male, female}, {arizona, california, montana, new york}, {short, tall}, {asian, african-american, caucasian, hispanic, native american, polynesian}, {straight, curly}, etc. some categorical variables are ordinal. the distinction between categorical variables and qualitative variables is a bit blurry. c.f. quantitative variable.
- An attribute or variable that can only take on a limited number of values. typically, it is assumed that the values have no inherent order. prediction problems with categorical outputs are usually referred to as classification problems. see also: data mining, ordinal variable.
Quantitative variable, английский
A variable that takes numerical values for which arithmetic makes sense, for example, counts, temperatures, weights, amounts of money, etc. for some variables that take numerical values, arithmetic with those values does not make sense; such variables are not quantitative. for example, adding and subtracting social security numbers does not make sense. quantitative variables typically have units of measurement, such as inches, people, or pounds.
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