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Background information (Chinese pdf only) Outline of Dr Robert Chung's presentation (Chinese pdf only) Teaching aid:Standard error of percentage (Excel document) Teaching aid:Promotion of "Guidelines for the publication of opinion surveys by Hong Kong media" (Chinese pdf only) Teaching aid:ESOMAR/WAPOR Guide to Opinion Polls (abstract, in pdf format) Teaching aid:HKU POP's first press release of rolling survey results dated August 9, 2004 Teaching aid:HKU POP's fourth press release of rolling survey results dated August 14, 2004 (in pdf format) Photographs