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Number of motor vehicles


'Number of motor vehicles' is the number of motor vehicles that are mechanically operational, but not necessarily licensed or having a current warrant of fitness, and are available for private use by the residents of private dwellings.

Motor vehicles include:

  • cars, station wagons, vans, trucks, four-wheel-drive vehicles and other vehicles used on public roads
  • business vehicles available for private use by people in the dwelling
  • vehicles hired or leased
  • vehicles temporarily under repair.

They do not include:

  • motorbikes or scooters
  • vehicles used only for business
  • farm vehicles not licensed for road use
  • vehicles that belong to visitors
  • vehicles occasionally borrowed from another household.

Relationship to questionnaire(s)

Data on number of motor vehicles comes from question 18 on the dwelling form (PDF 783kb).

Subject population

The subject population is the people, families, households or dwellings to whom the variable applies.

The subject population for this variable is households in private occupied dwellings. Visitor-only private dwellings are excluded.

Non-response rate

The 2006 non-response rate was 4.1 percent.

The 2001 non-response rate was 4.2 percent.

Quality Management Strategy priority level

Number of motor vehicles is a supplementary variable.

The Census Quality Management Strategy assigns a priority level to all census variables.

Supplementary variables do not fit in directly with the main purpose of a census, but are still of importance to certain groups. These variables have third priority in terms of effort and resources.

All data must meet minimum quality standards in order to make it suitable for use.

Comparability with 1996 and 2001 Census data

There are no issues affecting the comparability of this data with 1996 and 2001 Census data. There is a new 'response unidentifiable' category in 2006, but it has had no impact on comparability with 1996 and 2001 data, because of the low number of responses classified in this category.

Significant issues

There are no significant issues that users should be aware of.

Other things to be aware of

  • All census data was subject to considerable checks (including edits) during processing and evaluation, to ensure that it meets quality standards and is suitable for use. These checks were applied to data supplied both on paper and on Internet forms. In addition to these quality checks, the Internet form had built-in editing functionality that directed respondents to the appropriate questions and ensured that their responses were valid. As a result of this, data from Internet forms may be of higher overall quality than data from paper forms. The significance of this will depend on the particular type of analysis being done.
  • There were differences between how the forms were completed on the Internet and on paper for this variable:
    • The Internet form allowed only one response to be selected for the number of motor vehicles question. If a further response was selected, the response given previously disappeared. Multiple responses to this question were possible when forms were completed on paper.
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