|Page tools: Print Page Print All RSS Search this Product|
7 During Census processing, values for Age, Sex, Registered marital status, and State/Territory of usual residence were imputed if they were left blank on the Census form (i.e. missing item response from an otherwise responding person). These variables are needed for population estimates, so they were imputed using other information on the Census form. These were also the only variables imputed for the imputed persons in non-responding dwellings.
8 Values for all other variables left blank (e.g. Indigenous status, Country of birth or Occupation) were set to not stated or not applicable, depending on the (possibly imputed) age of the person.
9 While the method of imputation remained the same as 2011, the 2016 Census experienced a reduction in the amount of quantitative information they could use in their imputation model. Specifically, the ‘credible source’ information collected for non-responding dwellings (where possible) in previous Censuses was no longer collected. This meant that information, such as whether the dwelling was occupied on Census night and the number of males and females in that dwelling, was no longer available to guide the imputation process. Instead, imputation was based solely on the values observed for responding persons.
10 For further information about imputed persons and how they are treated in PES, see Components of Net Undercount on the Summary tab.
RESOLUTION OF CENSUS NOT STATED VALUES FOR PES
11 The PES uses Census data items to form benchmark categories for weighting and estimation purposes, including Indigenous status and Country of birth. In cases where one or both of these two items had been set to not stated in the Census, a value was imputed during PES processing so they could be used for benchmarks in PES estimation.
12 The imputation method involved imputing both variables together. For benchmarking purposes, 12 non-overlapping categories were defined (e.g. Australian born and not of Aboriginal or Torres Strait Islander origin, or born in one of the ten highest ranked countries and not of Aboriginal or Torres Strait Islander origin). Imputation was performed within a number of imputation classes based on geography (SA2), the Census form type, age and sex. The imputed value was based on the proportion of stated values of respondents in the same imputation class. This method also required the assumption that anyone who was imputed as Aboriginal or Torres Strait Islander was also born in Australia.
CENSUS DWELLING TYPES
13 Although all persons resident in Australia should have been counted in the Census, not all dwellings would have received a Census form. This is because not all dwellings were habitable or they were missing from the ABS Address Register, or, in the case of a diplomatic dwelling, did not contain people within scope of the Census.
14 Census defines private dwellings as structures established for self-contained accommodation. A private dwelling is most often a house or flat. It can also be a caravan, houseboat, tent, or a house attached to an office, or rooms above a shop. Private dwellings are either occupied or unoccupied:
15 Private dwellings may also be classified as non-responding or a refusal in the Census:
16 For PES purposes, dwellings that provided a Census form after the commencement of PES enumeration were flagged as late returns for PES estimation. For information on the treatment of late returns, see Components of Net Undercount on the Summary tab.
CENSUS DATA QUALITY
17 Census data are subject to a number of inaccuracies resulting from errors by respondents or mistakes in collection or processing. While many of these are corrected by careful processing procedures, some remain. The effect of the remaining errors is generally slight, although it may be more important for smaller groups in the population.
18 The main kinds of errors occurring in the Census are:
19 For further information on sources of error in the Census, see the ABS publication Census of Population and Housing: Census Dictionary, 2016 (cat. no. 2901.0), released on 23 August 2016.
These documents will be presented in a new window.