Statistical Analysis of the Post-Election Audit Data 2011 November Election

Posted: June 7th, 2012 | Author: | Filed under: Statistical Analysis | Tags: , , , , , ,

The Center for Voting Technology Research (VoTeR Center) at the School of Engineering of the University of Connecticut received the data gathered in the post-election audit performed in the State of Connecticut following the November 2011 election. The audits involved the randomly selected 10% of the districts and the audit returns were conveyed by the Office of the Secretary of the State (SOTS) to the VoTeR Center on December 22nd of 2011. The audit data received by the Center contains 887 records, where each record represents information about a given candidate: date, district, machine seal number, office, candidate, machine counted total, hand counted total of the votes considered unquestionable by the auditors, hand counted total of the votes considered questionable by the auditors, and the hand counted total, that is, the sum of undisputed and questionable ballots. This report contains several statistical analyses of the audit returns and recommendations.

The VoTeR Center’s initial review of audit reports prepared by the towns identified a number of returns with unexplained differences between hand and machine counts. Audit returns included 45 records with discrepancies higher than 5, with the highest reported discrepancy of 40. It is worth noting that 75% (30 out of 45) of the records that were subject to the follow up investigation already contained information indicating that the discrepancies were due to the human error. Following this initial review the SOTS Office performed additional information gathering and investigation of those 45 records. The final information was conveyed to the Center on May 18th of 2012. The rest of the records (842 out of 887) discussed in this audit report are the original records reported by the towns.
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Technological Audit of Memory Cards for the November 8, 2011 Connecticut Elections

Posted: April 5th, 2012 | Author: | Filed under: Post Election, Pre Election | Tags: , , , ,

The Center for Voting Technology Research (VoTeR Center) at the School of Engineering of the University of Connecticut performed pre-election and post-election audits of the memory cards for the Accu-Vote Optical Scan (AV-OS) tabulators used in the November 8, 2011 elections. The cards were programmed by LHS Associates of Salem, New Hampshire, and shipped to Connecticut districts.

For the pre-election audit, the Center received 453 memory cards from 331 districts. Cards were submitted for two reasons per instructions from the SOTS Office (a) one of the four cards per district was to be selected randomly and submitted directly for the purpose of the audit, and (b) any card was to be submitted if it appeared to be unusable. Given that cards in category (a) were to be randomly selected, while all cards in category (b) were supposed to be submitted, and that the cards were submitted without consistent categorization of the reason, this report considers all unusable cards to fall into category (b).

Among these 453 cards, 223 (49.2%) fall into category (a). 100% these cards were correct. These cards contained valid ballot data and the executable code on these cards was the expected code, with no extraneous data or code on the cards. We note that the adherence to the election procedures by the districts is improving, however the analysis indicates that the established procedures are not always followed; it would be helpful if reasons for these extra-procedural actions were documented and communicated to the SOTS Office in future elections.
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Statistical Analysis of the Post-Election Audit Data 2011 September Primary Election

Posted: November 30th, 2011 | Author: | Filed under: Statistical Analysis | Tags: , , , , , ,

The Center for Voting Technology Research (VoTeR Center) at the School of Engineering of the University of Connecticut received the data gathered in the post-election audit performed in the State of Connecticut following the September 2011 election. The audits involved the randomly selected 10% of the districts and the audit returns were conveyed by the Office of the Secretary of the State (SOTS) to the VoTeR Center on November 18th of 2011. The audit data received by the VoTeR Center contains 83 records, where each record represents information about a given candidate: date, district, machine seal number, office, candidate, machine counted total, hand counted total of the votes considered unquestionable by the auditors, hand counted total of the votes considered questionable by the auditors, and the hand counted total, that is, the sum of undisputed and questionable ballots. This report contains several statistical analyses of the audit returns.

This report presents the analysis of 83 records. The data presented in this analysis show that the absolute average reported discrepancy is lower than the number of questionable ballots (0.04 versus 0.93).
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