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9 This release includes information reported by those ISPs who operated in Australia and reported more than 10,000 active subscribers as at 30 June 2008. Figures on the volume of data downloaded relate to the three months ending 30 June 2008 as reported by ISPs operating at the end of June 2008.
10 The response rate for the IAS June quarter 2008 was 95%.
11 The total population for the survey was 37 ISPs.
12 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
13 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:
14 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 not normally revised.
15 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.
16 The number of ISPs reporting to the IAS does not necessarily equal the number of ISPs operating in Australia at the end of the reference period. Some ISPs have common ownership and as such provide data for all subsidiary ISPs on the one survey form. This should be taken into consideration when comparing the counts of ISPs from the IAS to other data sources.
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:
Information and Communication Technology, Australia, cat. no. 8126.0
Business Use of Information Technology, cat. no. 8129.0
Household Use of Information Technology, Australia, cat. no. 8146.0
Patterns of Internet access in Australia, 2006, cat. no. 8146.0.55.001
Use of Information Technology on Farms, Australia, cat. no. 8150.0
Summary of IT Use and Innovation in Australian Businesses, cat. no. 8166.0
Selected Characteristics of Australian Business, cat. no. 8167.0
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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