Effective sample size - AMSRS recorded webinar

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AMSRS Australia

The Australian Market & Social Research Society Limited (AMSRS) is a not-for-profit professional membership body of over 2,000 market and social research professionals who are dedicated to increasing the standard and understanding of market and social research in Australia. The Society assists members to develop their careers by heightening professional standards and ethics in the fields of market and social research. Learn more about the AMSRS's: The Society works closely with the Association of Market and Social Research Organisations (AMSRO) in Australia to achieve these aims. The Society is affiliated with market research societies internationally and is a member of the Asia Pacific Research Committee (APRC) www.aprc-research.com and the Global Research Business Network (GRBN) www.grbn.org


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The focus of this webinar will be on providing participants with a greater awareness of the concept of effective sample size and how to make use of this concept in their day-to-day work. 

Learning Objectives

This webinar is aimed at those researchers who have a basic understanding of sampling (that is, some knowledge of simple random sampling, stratified sampling and survey weighting procedures) and would now like a greater understanding of the concept of effective sample size, including:

  •  The meaning of effective sample size
  •  The relationship between the sample size and effective sample size
  •  Sample design issues which can affect the effective sample size
  •  Methods of calculating the effective sample size, including an approximation based on the Weighting Effect (WEFF)

Webinar Time: 1-hour webinar

Speaker:  Dr Phil Hughes, Australia

Dr Phil Hughes is Regional Director, Sampling and Survey Design at ORC International. In his previous role, Phil was an Associate Professor with the Centre for Statistical and Survey Methodology at the University of Wollongong.

Phil has had over 40 years’ experience in survey design and analysis, both in the government and private sector, having previously worked for 18 years with the Australian Bureau of Statistics (ABS) and 18 years with Nielsen.

Prior to leaving Nielsen in 2008 he was responsible for the statistical standards for all surveys conducted in the 17 countries of Nielsen’s Asia Pacific region. In that role he was responsible for the developing and conducting internal training courses for Nielsen’s market research professional staff, focusing on the practical issues of research design and survey analysis in a commercial market research context.

Phil has a BA (Hons), a B Ec. and a Masters Degree in Statistics, all from the Australian National University, and a PhD from the Department of Social Statistics at the University of Southampton. He is an Honorary Principal Fellow with the Centre for Sample Survey Methodology (CSSM) at the University of Wollongong and is an AMSRS Fellow.


Course content

  • Effective sample size video

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