Nominal category

nominal
A nominal category or a nominal group is a group of objects or ideas that can be collectively grouped on the basis of a particular characteristic—a qualitative property.wikipedia
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Categorical variable

categoricalcategorical datacategorical explanatory variable
A variable that codes whether each one in a set of observations is in a particular nominal category is called a categorical variable.
In statistics, a categorical variable is a variable that can take on one of a limited, and usually fixed number of possible values, assigning each individual or other unit of observation to a particular group or nominal category on the basis of some qualitative property.

Qualitative property

qualitativequalitative dataqualitatively
A nominal category or a nominal group is a group of objects or ideas that can be collectively grouped on the basis of a particular characteristic—a qualitative property.
The data that all share a qualitative property form a nominal category.

Ratio

ratiosproportionratio analysis
The members of a nominal group cannot be placed in ordinal (sequential) or ratio form.

Regression analysis

regressionmultiple regressionregression model
For example, the effect of race (nominal) on income (ratio) could be investigated by regressing the level of income upon one or more dummy variables that specify race.

Dummy variable (statistics)

dummy variabledummy variablesindicator variable
For example, the effect of race (nominal) on income (ratio) could be investigated by regressing the level of income upon one or more dummy variables that specify race.

Logistic regression

logit modellogisticbinary logit model
When nominal variables are to be explained, logistic regression or probit regression is commonly used.

Probit model

probit regressionprobitBayesian probit regression
When nominal variables are to be explained, logistic regression or probit regression is commonly used.

Spurious relationship

spurious correlationspuriousmisleading results
Correlating two nominal categories is thus very difficult, because some relationships that occur are actually spurious, and thus unimportant.

Nominal

nominally
Nominal category, a group of objects or ideas that can be collectively grouped on the basis of shared, arbitrary characteristic

Nominal group

Nominal group, alias for nominal category in statistics

Social value orientations

social orientationsocial value orientationSVO
The Slider measure assess SVO on a continuous scale, rather than categorizing subjects into nominal motivational groups.