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4 This supplementary survey also excluded people living in special dwellings (such as hotels, university residences, students at boarding schools, patients in hospitals, residents of homes (e.g. retirement homes, homes for persons with disabilities), and inmates of prisons).
5 This supplementary survey was conducted in urban, rural, remote and very remote areas in all states and territories of Australia, except Indigenous Communities. This is the first time the WMTU Survey has included households residing in very remote parts of Australia, namely in Queensland, South Australia, Western Australia, Tasmania and the Northern Territory. This inclusion has minimal impact on Australian level estimates.
6 The survey's coverage was households in urban, rural, remote and very remote areas in all states and territories of Australia, excluding households in ICF CDs.
7 The Monthly Population Survey (MPS) is based on a multi-stage area sample of private dwellings (houses, flats etc.) and a list sample of non-private dwellings (hotels, motels etc.). The sample size for a MPS is approximately 33,000 dwellings but only half of these were included in the WMTU Survey. After taking into account sample loss, the response rate for the survey was 90%. In total, information was collected from 12,870 fully responding households.
8 Information was collected through either face-to-face or telephone interviews conducted over a two week period during March 2012. Information was collected from any responsible adult in the household aged 18 years and over, responding on behalf of the household for the waste management and motor vehicle ownership topics, and for a randomly selected household member for the transport use topic.
9 Weighting is the process of adjusting results from a sample survey to infer results for the total population. To do this, a 'weight' is allocated to each enumerated person or household. The weight is a value which indicates how many persons or households in the population are represented by the sample person or household.
10 The first step in calculating weights for each unit is to assign an initial weight, which is the inverse of the probability of the unit being selected in the survey. For example, if the probability of a person being selected in the survey was 1 in 1,200, then the person would have an initial weight of 1,200 (that is, they represent 1,200 people).
11 The initial weights are then calibrated to align with independent estimates of the population, referred to as benchmarks. The population included in the benchmarks is the survey scope. This calibration process ensures that the weighted data conform to the independently estimated distribution of the population described by the benchmarks rather than to the distribution within the sample itself. Calibration to population benchmarks helps to compensate for over or under-enumeration of particular categories of persons which may occur due to either the random nature of sampling or non-response.
12 The survey uses estimated resident population (ERP) based person and household benchmarks for each state and territory of Australia, as at 31 March 2012.
13 Survey estimates of counts of persons or households are obtained by summing the weights of persons or households with the characteristic of interest.
RELIABILITY OF THE ESTIMATES
14 Estimates in this publication are subject to sampling and non-sampling errors:
15 Information recorded in this survey is essentially ‘as reported’ by respondents and hence may differ from that which might be obtained from other sources or via other methodologies. This factor should be considered when interpreting the estimates in this publication.
16 The previous WMTU survey was conducted in March 2009. Data from the 2012 WMTU Survey is released under the title Environmental Issues: Waste Management, Transport and Motor Vehicle Usage, 2012 (cat. no. 4602.0.55.002) whereas data from the 2009 WMTU survey has been released under the title Environmental Issues: Waste Management and Transport Use, Mar 2009 (cat. no. 4602.0.55.002). Please note, that the catalogue numbers of these two releases are the same.
17 Prior to 2008, the annual publication Environmental Issues: People's Views and Practices (cat. no. 4602.0) focussed on one of three rotating topics each year: Energy Use and Conservation; Waste Management, Transport and Motor Vehicle Usage; and Water Use and Conservation.
18 The ABS seeks to maximise consistency and comparability of estimates over time by minimising changes to its surveys. However, sound survey practice requires ongoing review to maintain the relevance of the data. A few changes were made to the survey between 2009 and 2012 which may impact on the comparability between surveys. These changes are outlined below:
19 Country of birth data are classified according to the Standard Australian Classification of Countries (SACC), 2011 (cat. no. 1269.0).
20 Remoteness areas are classified according to the Statistical Geography Volume 1 - Australian Standard Geographical Classification (ASGC), Jul 2006 (cat. no. 1216.0).
21 ABS surveys draw extensively on information provided by individuals, businesses, governments and other organisations. Their continued cooperation is very much appreciated; without it, the wide range of statistics published by the ABS would not be available. Information received by the ABS is treated in strict confidence as required by the Census and Statistics Act 1905.
22 The ABS plans to conduct this survey again in March 2015.
23 Users may also wish to refer to the following ABS publications:
24 Further key references on waste management and transport use can be found through the following web sites:
DATA CUBE TABLES
25 All tables in this product release are available in a Data Cube (one spreadsheet for each topic). For a list of tables in each of the three data cubes, please refer the contents page of each spreadsheet.
DATA AVAILABLE ON REQUEST
26 In addition to the statistics provided in this publication, the ABS may have other relevant data available on request. Subject to confidentiality and sampling variability constraints, tabulations can be produced from the survey. All inquiries should be made to the National Information and Referral Service on 1300 135 070.
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