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9 This release includes information reported by those ISPs who operated in Australia as at 30 June 2010. Figures on the volume of data downloaded relate to the three months ending 30 June 2010 as reported by ISPs operating at the end of June 2010.
10 The response rate for the June 2010 IAS was 99.2%.
11 Where data were missing or required clarification, respondents were contacted in the first instance. When necessary, missing data were imputed based on historical data collected.
RELIABILITY OF DATA
12 As the IAS does not have a sample component, the data are not subject to sampling variability. However, other inaccuracies, collectively referred to as non-sampling errors, may affect the data. These non-sampling errors may arise from a number of sources, including:
13 Every effort has been made to reduce non-sampling error to a minimum by careful design and testing of questionnaires, efficient operating procedures and systems, appropriate methodology, and contact with providers to resolve anomalies. Errors in previous cycles data are only revised where they have a significant impact on the data released.
14 Download data presented should only be considered as an indicative measure of internet activity during the reference period and therefore should be used with caution. In addition, some ISPs provide proportions in lieu of actual state subscriber numbers. This data therefore has an element of estimation and should be used with caution.
15 A reporting error identified this quarter has resulted in data being revised for the December quarter 2009 IAS. Due to a change in the computer systems used to process the IAS, the ABS is unable to revise data prior to this. Fixed wireless subscribers is the only data item significantly impacted by this revision and readers are advised to use the December quarter 2008 and June quarter 2009 figures with caution.
16 A glossary of the terms used in this release can be found under the theme pages for Innovation, Science and Technology.
17 ABS releases draw extensively on information provided freely 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.
18 In particular, the ABS acknowledges the assistance of the TIO in providing regular lists of registered ISPs.
19 Other ABS releases on information technology and telecommunications in Australia are:
Use of Information Technology on Farms, Australia, cat. no. 8150.0
Household Use of Information Technology, Australia, cat. no. 8146.0
Patterns of internet access in Australia, 2006, cat. no. 8146.0.55.001
Summary of IT Use and Innovation in Australian Businesses, cat. no. 8166.0
Selected Characteristics of Australian Business, cat. no. 8167.0
Government Technology, Australia, cat. no. 8119.0
Information and Communication Technology, Australia, cat. no. 8126.0
DATA AVAILABLE ON REQUEST
20 As well as the statistics included in this and related releases, the ABS may have other relevant data available on request and for a charge. Inquiries should be made to the National Information and Referral Service on 1300 135 070.
MORE INFORMATION ON ABS INFORMATION TECHNOLOGY STATISTICS
21 Information about ABS activities in the field of information technology statistics is available from the Innovation Science and Technology Theme page on the ABS web site.
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