# 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

13 Related Articles

### 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.

### Level of measurement

**quantitativescaleinterval scale**

*Level of measurement

### 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.

### List of statistics articles

**list of statistical topicslist of statistics topics**

Nominal category