Statistical Units
- Objects on which data is observed
- Examples:
Population
- Set of all statistical units
- Examples:
- All houses in Munich
- All eligible Voters
Sample
- Actual subset of the population surveyed
- Sample is a representation of the population
- Examples:
- Drawing random examples (House on Street XY)
- Full survey:
- Entire population is examined
Characteristics
- Characteristic or Variable: Quantity of interest on observed a statistical unit
- As a rule: often multiple characteristics are collected on one statistical unit
- Examples:
- Rent index characteristic:
Net rent or Living Space, etc
- Opinion poll variable:
Gender or preferred party, etc
- Characteristic value:
- The actual value for a statistical unit
- Examples:
- for characteristic Gender:
male or female
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