[an error occurred while processing the directive] 香港大學民意研究計劃 Public Opinion Programme, The University of Hong Kong

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Step 1: Late submissions
 
Submissions received after the 23:59 of January 16, 2004 were not processed. A total of 833 submissions were kept as preliminary valid cases.
 
Step 2: Unknown personal particulars
 
21 cases without any personal particular were dropped, and the remaining 812 cases entered the next stage.
 
Step 3: Doubtful leaflet codes
 
9 cases with repeated leaflet codes were identified, only the last submission of each case was kept. 60 cases with invalid leaflet codes were dropped; another 67 cases with null leaflet codes were also dropped, leaving behind 676 valid cases.
 
Step 4: Repetitive IP addresses
 
174 skeptical cases with repetitive IP addresses were identified, they were examined in terms of their time-chop, nature of their outgoing website, and content of their submissions. Finally, 0 case was confirmed to be repetitive and was eliminated from the dataset. The remaining 676 submissions comprised the final sample.
 
Figure 1. Verification procedures for online submissions