# SPSS Statistics Variables Level of Measurement

In SPSS Statistics, the level of measurement of the variables defines which summary statistics and graphs should be used. The following table provides definitions, examples, appropriate summary statistics, and graphs for the level of measurement of the variables.

Nominal | Ordinal | Scale | |
---|---|---|---|

Definition |
Unordered categories | Ordered categories | Both interval and ratio |

Examples |
Gender, geographic location, job category | Satisfaction ratings, income groups, ranking of preferences |
Number of purchases, cholesterol level, age |

Measures of Central Tendency |
Mode | Median | Median or mean |

Measures of Dispersion |
None | Min/max/range | Min/max/range, Standard deviation/ variance |

Graph |
Pie or bar | Bar | Histogram |